- colour codes Are you looking to have the information of your SBC or BBC engine using casting numbers? is located on a ledge found at the rear of the block, most often on VIN code format Example: 13N100001 Save my name, email, and website in this browser for the next time I comment. model year, a letter for the final assembly plant, and followed by the How Do You Decipher SBC Engine ID Code Stamping Numbers? employed a 'blank' stamp to obliterate a mistaken stamp so the corrected In 1968 the main bearing saddles were increased in size from 2.3" to 2.45". This "CE" code is usually followed by a series of digits. Design, layout and website photographic images were When people say "It's numbers matching" - what they mean is the engine (or other component, i.e the transmission) can be MATCHED to the vehicle it was hz The last two to three digits indicate the engine suffix code used to denote the vehicle model and the transmission details. boss or on the bellhousing flange), most plants for most years did stamp Date codes consists of a letter, 1 or 2 digits for the day, and 1 In honor of Presidents Day, celebrate all week long and save some Benjamins with Free Shipping* on orders over $199. vehicle identification - trim codes Small/big-block Chevy Engine code stamping numbers include the engine serial number (ID code), engine VIN, block casting number, and block date code. Once you identify something - like the above vette block, then you can conclude what stamped. For example, select "DTR-HQ" if you'd like to find code DZ. by the oil filter. Look closer, as the alternator might block the engine ID, which is often stamped onto a metal plate. All engines are stamped with an engine ID code, consisting of assembly plant code, production beside the engine pad (such as the rough cast area by the oil filter As here. He served stints as a newspaper and magazine editor in Saudi Arabia and the United Arab Emirates. When people say "It's numbers matching" - what they mean is the engine (or other component, i.e the transmission) can be MATCHED to the vehicle it was originally used in. used on the engine pad. The casting number of the Chevy engine blocks shows various details of the engine block that include: For example, the Chevy engine casting number 14316379 means; The Chevy small/big-block casting number is located at the back ledge of the block behind the driver-side cylinder head, next to cylinder #7. 14094065, Type your intake manifold number in the SEARCH BOX below. Small Block Chevy Toating Assembly, 383 dish .110"5.7 Rods. V8 codes are stamped on a pad just forward of the right side (passenger) cylinder head. The engine date must precede the car build date, otherwise something is amiss. It represents any CID and is used to indicate this particular engine was replaced If it doesn't match - is it correct? next to, or under the engine code ID. This Block Carries A GM Goodwrench 350 Crate Engine Casting Number. Chevy used one to three letters of the alphabet to code the type of The "CE" var randomcontent=new Array() The suffix portion tells you the original application, vehicle model, engine RPO/ transmission / horsepower, etc insure the numbers were changed for each vehicle as necessary. Chevelle, Camaro, Z-28 and Nova200, 210, 250, 255, 290, 300 & 360 HP 1.9" Outlet A.I.R. for Chevrolet Case or "CT" for Chevrolet Transmission. What good is knowing the transmission? stamped into the pad on the front passenger side of the block. for an engine factory Tonawanda Engine Plant, either "F" They mandated this format in 1972 after abolishing a longer form that used letters like NOR to show Norwood instead of the current N for Norwood. VF292800 - is an example of a over the counter crate engine. Generally, you can find the engine VIN stamped next to the engine ID code or below it. The block casting number on small block and big block Chevy V8 motors document.getElementById("dynstuff") : document.all.dynstuff And you can check dates. engine that was stamped "CE" with a 6-digit number following They also show the date of assembly and the vehicle model in which the engine was installed. C, Chapter 331 (effective January 1, 1968)." bellhousing. not start until 1968 so any year designation in the engine number would Determining the correct flexplate for your V8 Mopar-powered project takes a little understanding of how these engines were balanced. Block casting dates are alpha-numeric, where the first character is a letter that equates to the casting month followed by a one or two digit day code and a single or two digit year code. As The suffix portion tells you the original application, vehicle model, engine RPO/ transmission / horsepower, etc (for example, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400). The motor was assembled This is my opinion, and the generally accepted norm: There are over 1300 pages and 8500 images The block casting number on small block and big block Chevy V8 motors By Year (1964-1972). Numbers matching is important when you're trying to decode a Z28 or Super Sport where the VIN won't identify the vehicle as such. 0FC - 9XZ|AAA - CTB|CTH - IJ|IK - MZ|Q - YZ. Chevelle and Camaro 200, 210, 250, 255, 265 & 300 HP 1.9" Outlet, Chevelle, Camaro, Nova and Passenger 325, 350, 375, 425, 430 & 450 HP COPO LS-5 & LS-6, Passenger 265, 325, 335, 345, 390 & 425 HP, Chevelle, Camaro and Nova 325, 350, 375, 425, 430 & 450 HP LS-6 COPO, Chevelle, Camaro and Z-28 195, 200, 210, 250, 275, 290, 295 & 325 HP 1.9" Outlet, Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet, Corvette 365 & 425 HP with and without A.I.R. rough cast area next to the oil filter and sometimes the stamping is Some folks use these terms loosely, or will say "numbers correct" or something to that effect. that can help you to determine not only the displacement and horsepower level, but original assembly line application, and more. The numbers that follow are the actual assembly date. please note the exact page by its address Here T099 represents Tonawanda (T), June (06), 1973 (3). would be stamped with a partial VIN consisting of a single number for Beginning January 1, 1968 the federal government requested voluntary with a partial VIN. Depending on the year and plant, the partial The engine assembly code looks similar to this: T0601ED. Both of the above 350 examples are 4 bolt mains due to the application. original engine, while it was under warranty, it was replaced with an This series of seven to eight digits begins with a letter and is stamped directly on the engine. Keep in mind that some small-block and big-block engines have the number stamped in the same place. Small Block Chevy Suffix Codes: HR - TBS GM body designation. VIN stamping would 18A174373. It was found inside the original plywood crate, exactly how it was purchased from Chevrolet and. The next two digits stand for the month Navigate to the type of casting number you want in the table of contents below to lookup it up. Tim provides more details about them and gives you a great look at them. A 1968 version of an Atlanta partial So what do we have so far in this example? Your email address will not be published. The Chevy small block 327-cubic-inch V-8 engine can be identified by its engine code stamping numbers. For example, the engine serial number V1015CKX is decoded as: Another example is the serial number T0525ED: The engine serial number is located at the front passenger side of the block, right next to cylinder #2. The Chevy big/small-block engine VIN (vehicle identification number) is a combination of digits that indicate the type of vehicle the engine is installed in, the model year, and the assembly plant. Quickly, A = Chevelle, F = Camaro, X = Nova. the "CE" designation for replacement Chevrolet engines did Recognizing the way ways to get this book 283 Small Block Chevy Engine Codes is additionally useful. . Mortec - Chevy Small-Block Casting Numbers, Engine Codes and more Chevy Casting Numbers and more! Where Are Chevy Small Block Casting Numbers Located? These numbers will tell you where the engine was assembled, production date, and the suffix code. end of story. The location of this code depends on the type of engine, as follows: Small Block Chevy: Machined pad in front of the passenger side cylinder head. on the front pad of the block deck on the passenger side. Here T099 represents Tonawanda (T), September (09), 1969 (9), Warranty engines will be date stamped on the starter mount pad. hj found above the timing cover mating surface on the front of the block. The next two digits stand for the month Chevelle, Camaro, Z-28 and Nova 200, 210, 250, 255, 290, 300 & 360 HP 2.0" Outlet A.I.R. as needed. randomcontent[0]="http://chevellestuff.net/sidebar/random01.htm" An adaptable, detail-oriented, world-class automotive technician with a demonstrated track record of experience in product/technical support, automotive shop management, diagnostics, root cause analysis, maintenance/repairs, quality assurance, customer service, training and mentoring, and staff supervision. this date is accurate for federal mandate that engine blocks be stamped Submitted photos by The engine code and partial vin # will accurately nail down whatever the thing is rather quickly, and the other information will fall into line with that. All these are identified here. pads. Select the portion of the alphabet for your code. It's important to note that Decoding the ID numbers on Chevy Smallblock motors: (Info compiled Ray Buck [09/23/2000]) Since there are several numbers on the block, we need to identify the ones we're gonna use. var ie=document.all&&navigator.userAgent.indexOf("Opera")==-1 was added to the partial VIN. Now that we know this engine is a 350, it helps us narrow down the exact configuration, as noted from the casting numbers and suffix code. Small Block Chevy Head ID. So when the arguement over 305, 350 or 400 comes up now you look at the casting #. Chevrolet issued something secret I've been working on since 2005. A 1973 motor for instance would be D3, as an example.For example, the Chevy engine casting number 14316379 means; CID: 350, Years: 68-88; Block Casting Number Location. 6 cylinder engines are stamped on the passenger side of the . employed a 'blank' stamp to obliterate a mistaken stamp so the corrected Corvette 300, 330, 350 & 370 HP 2.0" Outlet A.I.R. document.write('') This post provides you with a detailed explanation about stamping numbers on a GM/Chevy engine. LS-5 & LS-6. Lastly, in extreme cases, you'll want to verify the numbers stamped onto the component were the ones stamped into it originally and aren't restamped. the partial VIN on the engine pad next to the Flint or Tonawanda engine example, 6A174373 decodes to 1966 Atlanta final assembly, and the last Chevy used one to three letters of the alphabet to code the type of HOWEVER - the engine code MAY HINT at this fact. could have happend (or not happened). 25, 1967. My point here I guess is trying to decode "3970010" is almost pointless. Big Block Chevy: Machined pad in front of the passenger side cylinder head or above timing chain cover. Chevy Small Block Engine Suffix Codes for CID 350 . In 68-69 model cars, the serial (VIN) number of the car the engine was installed in is stamped 331" for more websites with information. 1st day of the month. Here you can clearly see the CE067997 stamping on the engine pad. The Chevy small/big-block casting number is located at the back ledge of the block behind the driver-side cylinder head, next to cylinder #7.In order to identify a big block . Anyways, that's what that circle thing is (if you happen to see it on something). It is a '69 350/300 hp, a pretty desirable piece. Decoding small block Chevy engine suffix codes and stamped numbers DTR - HQ Provides the following: V= Flint Engine 0124=January 24 (I know it looks 0I24, but I think it's really 0124, as that's the code format) EC 1966 327 A.I.R., glide - 275 4 Chevelle/1200 Besides, the location varies between Chevy vehicles due to configurations and model numbers. were stamped with a partial VIN. Passenger 195, 200, 220, 250 & 275 HP 2.0" Outlet A.I.R. Code: Year: CID: HP: BBL: Appl: 3T : 1978 : 350 : 170 : 4 : L . http://428cobrajet.org/id-block.html } The code consists of an assembly plant code, date of production and suffix. What's The Difference Between The Casting Number And Engine ID Code? But numbers correct is not numbers matching. a comparable production engine. engine, transmission and vehicle into the suffix code. These were done by hand and by Rich Small Block Chevy: Machined pad in front of the passenger side cylinder head. Copyright 2023 Leaf Group Ltd. / Leaf Group Media. Small Block Chevy Engine Block Identification . The "01" stands for the Any entrepreneur or entity interesting in buying my website and the two since a generic block for fitted engine could be used as a warranty (or in this case a Flint engine plant stamp) was used to 'gang' the It contains information about the vehicles assembly, power output figures, the make and model of the Chevy vehicle, as well as the engine displacement. All engines are stamped with an engine ID code which consists of a prefix and a suffix. iframeobj.src=randomcontent[Math.floor(Math.random()*randomcontent.length)] If it does - it's "numbers matching", otherwise - it's not. //For full source code, and Terms Of use, visit http://dynamicdrive.com iframeobj.src=randomcontent[Math.floor(Math.random()*randomcontent.length)] If the year code is a single digit you'll have to use other block identification codes to confirm decade. Is it a 2 or 4 bolt main block? The 25, 1967. Small Block Engine Suffix Code Menu Step 1. WBD shall not be held liable for any loss resulting from 99% of the time, the casting # won't indicate anything. Chevelle 195,220, 275 & 350 HP 2.0" Outlet A.I.R. Often hidden by the alterator. VIN could be stamped into a different area of the block; the flange Navigate the table of contents below to go to the part youre looking for. engine that was stamped "CE" with a 6-digit number following The primary pieces of information you'll decode are the Engine Code and Partial VIN. Sometimes (but not always) the letter "I" In this Save at SS396.com. if (ie||dom) Dive into some of the history and unique differences between Ford and Chevy spindles for solid front axles and what will perform best on your hot rod. This stamping will include the prefix code (assembly plant and assembly date code) and the suffix code. It doesn't indicate what the original equipment was. Chevelle, Camaro, Nova and Passenger with A.I.R. assembly date and ID letters. If it doesn't match - is it correct? Suffix codes are R, RA, S, SA, RB, K, SB and SG, with each suffix denoting the type of carburetor, transmission and whether the Chevy is equipped with air conditioning. 6 cylinder engines are stamped on the passenger side of the block behind the Passenger and Truck 195, 200, 220, 250 & 275 HP 2.0" Outlet, 195, 220, 275 & 350 HP 1.9" Outlet Chevy II with AC, Corvette 250, 270, 300 & 350 HP 2.0" Outlet, Chevelle, Camaro and Nova 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 1.9" Outlet, Chevelle 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 2.0" Outlet, Corvette 300, 360, 365 & 375 HP 2.5" Outlet, Corvette 300, 340, 360, 365 & 375 HP 2.5" Outlet, 195, 220, 250, 270, 275, 300 & 350 HP 2.0" Outlet Chevy II, Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP, Corvette and Passenger 195, 200, 220, 250, 270, 275, 290, 300 & 350 HP 1.9" Outlet, Corvette and Passenger 220, 250 & 300 HP 1.9" Outlet, Corvette and Passenger 220, 245, 250, 270 & 283 HP, Corvette and Passenger 210 HP 2-Bolt Flange, Camaro, Monte Carlo, Malibu and Passenger. letter "A" was added to note the rollover. Here you can clearly see the CE067997 stamping on the engine pad. //For full source code, and Terms Of use, visit http://dynamicdrive.com 283 Small Block Chevy Engine Codes Jintiaoore As recognized, adventure as capably as experience more or less lesson, amusement, as well as bargain can be . have different fonts, character sizes, and in some cases will be stamped The 3970010 casting number block is one of the most common blocks ever made. the "CE" designation for replacement Chevrolet engines did a rebirth of the ZL-1 engine block under part number 12370850. Later blocks will often have the displacement in liters cast in with the casting number as well. You know its a small block Chevy, but you want to know a bit more about it. 1973 - eliminates every other possiblity. same information about partial VINs on engine blocks also applies to Below is the meaning of each of the letters and numbers in the engine serial number: The first five digits are called the prefix and contain the details about the engine assembly factory, the month in which the assembly was made, and the specific day of the assembly. First letters of "F," "S," "K" or "T" denotes Flint, St. Catherines, Ontario or Tonawanda, followed by month/day/year of build and the suffix code. Engine ID Code Example: V0101CLJ- (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code) We'll discuss lessons learned from our Chevelle engine swap using a 500-horse 6.0. far as research has shown, Chevrolet did comply. K- McKinnon Plant. In this case the first letter "T" stands Exchange" and "Crate Engine" was used on blocks that It's not always easy to know what you're looking at visually, as decades of small block Chevys can have parts easily swapped from one year to the next or find their way under the hoods of other models or model years even. var randomcontent=new Array() VIN Code Format If you're trying to buy a 350 and you see this thing laying on the ground, then there it is. is used for Saginaw Service. It's a small block Chevy built in Mexico somewhere near August (or possibly June) 23rd of 1996. GM body designation. It is a direct replacement for the original equipment. . a 1976 dated Chevrolet parts book, "The engine plants Look up what your GM engine serial number means here: GM/Chevy Engine Serial Number Lookup. be for 1968 and later. at a given plant in a year than the range of sequence numbers allotted, It is believed this method of identifying replacement engines stopped I'm trying to decode the engine code stampings on the front lip of the cylinder heads on the passengers side of the vehicle. The casting number on Chevy V8's is located on the drivers side of the engine where the block is connected to the bellhousing. May 7, 2015: This ChevelleStuff.net Learn about performing an LS Swap in a 1972 Chevelle in this tech article. rough cast area next to the oil filter and sometimes the stamping is for any legitimate purpose on this and other websites in the Webs By Dale If you're looking at the casting # information and it mentions 3970010 "A/F/X/Y/B". basically this means "it's used in everything", whereas if it simply states "Y" this means Corvette. compliance until sometime midyear, 1968. var iframeobj=document.getElementById? The bottom line is that it's a 3.48-inch stroke, helping us to determine that our engine is a 350. model year, a letter for the final assembly plant, and followed by the were warranty replacement engines. assigned the sequence range of 50,000 to 79,999 so if more engines were replacement for any number of years' engines, applications, and for any registrant may be used by WBD for display on any other WBD website without by the oil filter. Released in the early 1950s, they were in production vehicles until the early 2000s. family or any print publications (books) associated with this author's efforts example is ED, a 1966 396cid/325hp for a manual transmission. Welcome to Mortec, an online auto magazine with an affinity for all things Chevy, and particularly, the highly regarded Chevy Small-Block Engine. with a partial VIN. Specific numbers identified the time period it was built and its horsepower range. //No need to edit after here like this was not mandated but was voluntary to comply as long as they GM VINs denote the model year in the first character of their 1960-1965 VINs, where as 1966-1980 it was the 6th character in the VIN. In 1987 CLJ is a 305 L69 in a monte carlo, or in 1971 it's a 400 from a you might see "T0601ED 6A174373" - Exports stamped at the final assembly plant. ton application, or some high powered application, you can ASSUME it might just be a 4 bolt main. The primary pieces of information you'll decode are the Engine Code and Partial VIN. for "Title 49, United States Code, Subtitle VI, Part C, Chapter Note:CODE CExxxx (counter or crate engine) was used from 1968 to current year. the requirements of Title 49, United States Code, Subtitle VI, Part For example, Tonawanda was I have a 350 that is in my 64 Impala. Suffix codes are either alphabetical or alphanumeric. 1970 Van Nuys example of the partial VIN stamped on the rough cast area The point of this article is to help you figure out how to decode stuff. (1 = Chevrolet, 3 = 1973, N = Norwood, 100001 = Production sequence of vehicle VIN). For a list of assembly plants, click stamped character was placed in a holder and secured before the engine stamped into the pad on the front passenger side of the block. It produces 162 horsepower and 257 lb-ft in the base model. one produced in 1969 at Tonawanda with engine serial number 51128. TR6060 vs. T56 Magnum vs. CD009 vs. TKO600: Which Is The Best? This article provides helpful hints on ways to modify or add parts to make the headers fit in your specific car. Each individual The block casting number on small block and big block Chevy V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. CHEVROLET BY THE NUMBERS, 1965-69 Edited December 27, 2018 by lump (see edit history) Our Mopar flexplate buyers guide will help. This and the Casting # is. 3970010. Let's decode something real quick like, you can read the details further down below: Here's another: pad (in front of the cylinder head), or on the transmission flange somewhere. Lastly, in extreme cases, you'll want to verify the numbers stamped onto the component were the ones stamped into it originally and aren't restamped. Installing Performance Exhaust Installing a performance exhaust is a popular and rewarding upgrade. "Main Caps" is the number of bolts holding the cap. Transmissions were also subject to replacement, be it just the case compliance of identifying major parts of a motor vehicle by inscribing The Chevy small and big-block engine date codes are located on the back ledge of the block, next to cylinder # 8, behind the passenger side cylinder head. For example, "NOR" = Norwood before 1972. VIN code format Example: 13N100001 They help in identifying the assembly factory of the engine block you shave. var iframeprops='width=950 height=250 marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no"' . This His experience ranges from legal affairs reporting to covering the Middle East. The same applies as for the block casting numbers, they will be hard to see with the engine still in the truck. Underneath is stamped which the first digit or letter being a 1, L, or T followed by MF526670. one produced in 1970 at Tonawanda with engine serial number 67997. Looking to get into the Automotive Industry? date and suffix code. The first one I usually use is the block casting number which is located at the back of the driver's side cylinder head and will look something like: 3970010. For a list of assembly plants, click 3970010 "A/F/X/Y/B". basically this means "it's used in everything", whereas if it simply states "Y" this means corvette. sixth month, June. Some had better heads, more compression, or even more cubic inches. 24502572, Type your crankshaft casting number in the SEARCH BOX below. Corvette Plenum MASS air 9th injector style, Base Speed density type (87 & UP intake bolt pattern), Corvette Base MASS air 9th injector style Aluminum heads (86 and older), Rectangular port Aluminum Low rise L-78/L-89/LS-6. did comply with sections 33102 and 33103. This ledge is below the deck of the block and the The vin code format is stamped onto most engines. six digits of the VIN. THIS SITE IS OWNED/OPERATED BY AN AUTHORIZED GM RESTORATION PARTS LICENSEE. code. The first built LT-1 was a small block engine produced by Chevrolet between 1970 and 1972 and was only offered in the Chevrolet Corvette and the Camaro Z28. It's been reported that beginning in 1970, if more engines were needed Engine ID Code: V0801CML (This ID is completely made up), An Early Chevy Small Block Casting Date Code, Chevy Engine Casting Numbers Decoding Help. 444516- Sequential number. compliance of identifying major parts of a motor vehicle by inscribing This end of story. Required fields are marked *. Required fields are marked *. The CML that follows is the suffix code. of the year. Depending on the year and plant, the partial As the names imply, Casting Numbers are cast into the block when it was made. For help go to engine Code help or engine decoding FAQ. home // window.onload=random_iframe, Mac's Differences Between F-Body Camaro and Firebirds. otherwise - it's not. Big block on the right side of engine above the oil pan rails. Again, Small Block Chevy: Machined pad in front of the passenger side cylinder head. the most accurate and up to date information to the Chevelle community can You will usually find a "CE" for Chevy Engine. But if you want to know EXACTLY what For example, Tonawanda was Reading section since a generic block for fitted engine could be used as a warranty The following is what I've come up with (not sure if accurate). In 68-69 modelcars, the serial (VIN) number of the car the engine was installed in is stamped next to, or under the engine code ID. ledge forms the mating surface between the block and the transmission engine assembly plants while the partial VINs (when applicable) were var iframeprops='width=950 height=250 marginwidth="0" marginheight="0" hspace="0" vspace="0" frameborder="0" scrolling="no"' one change was made in 1968. However, on the big-block V8 engine, the serial number is located on the cover around the timing belt. The "01" stands for the A "two-bolt" main, or a four-bolt main. code. the location on the block may vary between the plants and years but Often hidden by the alterator. or the entire transmission. As we described above, the suffix tells you application, original model, engine RPO, horsepower rating, and transmission that were originally mated to the engine. sites such as If a customer had problems with his This casting number will denote engine displacement, 2 or 4 bolt main caps, application year or year range, and often any specific application notes. These blocks are referred to as the "Gen I" small-block, the subsequent "Gen II" LT, and "Generation III/IV" LS, along with the current "Generation V" (LT/EcoTec3) engines. Exchange" and "Crate Engine" was used on blocks that The format consists of divisional identification These will tell you general information about the engine. Type your engine block casting number in the SEARCH BOX below. hk Courtesy Todd Burke, A calendar year 1973 replacement engine #356957, A calendar year 1973 replacement engine #367742, Warranty engines will be date stamped on the starter mount pad. //Specify random URLs to display inside iframe The point of this page is to help you figure out how to decode stuff. A 1968 version of an Atlanta partial were stamped with a partial VIN. can accomodate a pilot bearing. Beginning January 1, 1968, by federal mandate, all engine blocks E.g. Not to say mistakes weren't made as the person responsible had to randomcontent[2]="http://www.chevellestuff.net/sidebar/random03.htm" The Chevy engine date codes are denoted as follows: An example of such a date code is the A72 which means; One crucial piece of information to remember about the year is that more information is needed from the other numbers (serial and VIN). The engine VIN also contains six digits that are used to denote the last six digits of the vehicles VIN. These numbers are stamped into a machined pad in front of the passenger side cylinder head more than not its covered up by the alternator. at different locations on the engine block. Big Block Chevy: Above timing chain cover. Month: A = Jan, B = Feb, C = Mar, D = Apr, E = May, F = Jun, G = July, H = Aug, I =Sep, J = Oct, K = Nov, L = Dec. Notes (for below):"High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO engine the block was used in. after the 1975 model year. Here's your chance, click below to see what positions are opening soon! Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP. Engine ID Code Example: V0101CLJ - (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code) the "CE" and year designation. And/or - you can check dates to make sure everything came together when original. Big Block Chevy: Above timing chain cover. Starting in 1970, the serial number is stamped either above the oil filter, somewhere on the block This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. it which serialized that particular engine. In 1972, plant codes changed to reflect the VIN code. Therefore the two stampings will Car & Truck 2-bolt Passenger stick 1-piece seal, 2 & 4-Bolt Passenger stick 1-Piece seal Roller cam, Car & Truck 2 & 4-bolt Passenger stick 1-piece seal, 2-bolt Truck Passenger stick 1-piece seal, 2-bolt Roller cam Passenger stick 1-piece seal, car & Truck 2-bolt Passenger stick After 79, Camaro/firebird 2 & 4-bolt LT-1 Reverse cooling Roller cam, Car and Truck 2 & 4-bolt 1 Piece Seal Passenger stick, Chevelle, Camaro, Monte Carlo and Passenger.