Decoding Chevrolet VIN, trim tags, cowl tags, engine, engine block casting numbers, cylinder head casting numbers, intake manifold casting numbers, transmission, interior codes, and paint codes. (G10,20), SU -- 230 6cyl w/ A.I.R. Big Block Chevy Suffix Codes: Q - YZ Abbreviations: AB = Air Brakes, AR = Air … Block Casting Number. If your block is from a truck, before the mid seventies, it won't have a partial VIN stamped on it. Numéro figurant à l'arrière du moteur côté boîte de vitesse: accueil engine code. The prefix portion of the ID code tells you the engine assembly plant code, and the engine’s assembly date (for example, 0701 = July 1st….no year is indicated). & 2BC (C10,20,30 P20,30), WJ -- 350 8cyl w/ M.T. The entire engine code contains the assembly plant, month and day. X* -- 235 6cyl Thriftmaster (31-32-36-3800), XG* -- 235 6cyl Thriftmaster w/ Hydramatic Trans (31-32-36-3800), V** -- 235 6cyl Thriftmaster w/ H.D. Engine Code Years Cid Application Engine Vin Hp Bbl Gm Body Comments ; 1: C: 1957: 265 Wipe any grease or dirt off the code to make sure you read each digit correctly. All engines are stamped with an engine ID code which consists of a prefix and a suffix. The entire engine code contains the assembly plant, month and day. Often hidden by the alterator. The suffix portion tells you the original application, vehicle model, engine … Six Cylinder: Passenger side of the block behind the distributor. QA. QA. 580, HP Solid Cam/11.25cr. and P.G. Chevy Camaro Big Block Engine Suffix Codes. big block Chevrolet engine suffix codes by minuit10 . Clutch (C10,20,30,40,K10,20), KA -- 235 6cyl Thriftmaster special w/ Hydramatic (P20,30), M -- 283 8cyl Trademaster (C10,20,30,K10,20,), MA -- 283 8cyl Trademaster w/ Powerglide (C10,20), N -- 230 6cyl w/ 3sp Trans (C10,20,K10,20), NE -- 230 6cyl w/ H.D. View Big Block Engine Casting Codes Select BB Casting Group ALL Block Codes 348/409 396/402 427 454 502 Clutch (34-35-3700), H -- 235 6Cyl. and 3sp Automatic (C10,20), PF -- 250 6cyl w/ 4sp Trans H.D. Clutch (C10,20 K10,20), TE -- 250 6cyl w/ Automatic Trans (C10,20), TT -- 250 6cyl w/ Powerglide (C10,20 K10,20), PW -- 250 6cyl w/ Automatic Trans (C20,30), TF -- 250 6cyl w/ 4sp Trans H.D. There are three block casting number types to look for: the block CASTING NUMBER, the block CASTING DATE and the ENGINE ASSEMBLY DATE/SUFFIX CODE. Chevrolet Suffix Engine Small block : 3N-CDR CE - CMJ CMK - CUD CUF - DTM DTR - HQ . (C10,20), YJ -- 327 8cyl w/ A.I.R. Quickly, A = Chevelle, F = Camaro, X = Nova. For help go to engine code help. (C10,20), WW -- 283 8cyl w/ A.I.R. Suffix codes are listed in alphabetical order by year. & 4BC (C10,20,30 P20,30), WN -- 350 8cyl w/ M.T. Drawings by David Kimble.Production of the original small-block began in the fall of 1954, for the 1955 model year, with a displacement of 265 cid, growing incrementally over time until reaching 400 cid in 1970. Big Block Chevy Suffix Codes: CTH - IJ. For help go to engine code help. Identifying a Chevy Big Block engine is simple once the codes are located on the engine and identifiers are translated. Chevy Big Block engines are a series of large displacement engines including: 348 ("W" series only) 366, 396, 402, 427, 454, 502 and, most recently, the 572. (31-32-36-3800), JC -- 235 6cyl Thriftmaster w/ 3sp. Clutch (C10,20,30 K10-20), K -- 235 6cyl Thriftmaster Special (P-20,30), KA -- 235 6cyl Thriftmaster Special w/ Hydramatic Trans (P20-30), M -- 283 8cyl Trademaster (C10,20,30 K10,20), MA -- 283 8cyl Trademaster w/ Powerglide C10,20), JB -- 235 6cyl Thriftmaster w/ Powerglide(C10,20), JC -- 235 6cyl Tiftmaster w/ H.D. Clutch and 4sp Trans (C10 K10), TK -- 250 6cyl w/ P.G. Decoding Big block Chevy engine suffix codes and stamped numbers: CTH - … (34-35-3700), KA -- 235 6cyl Thriftmaster w/ Hydramatic Trans (34-35-3700), M -- 283 8cyl Trademaster (31-32-36-38-4000), MA -- 283 8cyl Trademaster w/ Hydramatic Trans (31-32-36-38-4000), MB -- 283 8cyl Trademaster w/ H.D. Clutch (31-32-36-3800), JB -- 235 6cyl Thriftmaster w/ Powerglide (C10-20), JC -- 235 6cyl Thriftmaster w/ H.D. big block Chevy engine suffix codes by minuit10 . The entire engine code contains the assembly plant, month and day. or 3sp Automatic (P20), VR -- 292 6cyl w/ A.I.R. Clutch (C20,30 P20), UH -- 292 6cyl w/ Manual Trans (C10,20 K10,20), UP -- 292 6cyl w/ 3sp Automatic Trans (C10,20), UM -- 292 6cyl w/ Manual Trans (C20,30 K20 P20,30), UQ -- 292 6cyl w/ 3sp Automatic Trans (C20,30 P20,30), WC -- 307 8cyl w/ 3sp Automatic Trans (C10,20), WO -- 307 8cyl w/ 3sp Automatic T.H. & 4BC (C10,20,30 P20,30), XX -- 350 8cyl w/ M.T. Clutch (31-32-36-38-4000), WA -- 235 6cyl Thriftmaster w/ Hydramatic Trans (34-35-3700), A* -- 265 8cyl Trademaster (31-32-36-3800), B* -- 265 8cyl Trademaster w/ Hydramatic Trans (31-32-36-3800), M* -- 265 8cyl Trademaster w/ H.D. big block Chevy engine suffix codes by minuit10 . Many Chevy small and big block engines manufactured around 1966 had a three character engine suffix code, where the last character is an ‘H’ or an ‘R’. If you have some information you want to share with us and our visitors, stop by the Forum and leave us a post! If you're looking at the engine code - this is already known. GM body designation.All these are identified here.Quickly, A = Chevelle, F = Camaro, X = Nova. and Powerglide (G10), SP -- 194 6cyl w/ A.I.R. Vent (C10,20,30,K10,20), MY -- 283 8cyl w/ Powerglide and Pos. 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. and P.G. Big Block Chevy Suffix Codes: IK - MZ Abbreviations: AB = Air Brakes, AR = Air Injector Reactor, CA = California, HD = Heavy Duty, hdc = heavy duty clutch, HP = High Performance, LP = Liquid Propane Gas, PG = Powerglide, mt = manual trans, mt-3, 3 speed manual, SHP = Special High Performance, TH = Turbo Hydramatic, ti = transistor ignition. & 2BC (C10,20,30 P20,30), ZF -- 350 8cyl w/ M.T. Big Block Chevrolet casting number. Due to the fuel crisis in 1973, the massive 454 was primarily offered in heavy-duty General Motors trucks from 1974 to 1996. Big Block Chevy Suffix Codes: CTH - IJ Abbreviations: AB = Air Brakes, AR = Air Injector Reactor, CA = California, HD = Heavy Duty, hdc = heavy duty clutch, HP = High Performance, LP = Liquid Propane Gas, PG = Powerglide, mt = manual trans, mt-3, 3 speed manual, SHP = Special High Performance, TH = Turbo Hydramatic, ti = transistor ignition. Big Block Chevy V-8 Casting Numbers. The prefix portion of the ID code tells you the engine assembly plant code, and the engine's assembly date (for example, 0701 = July 1st....no year is indicated). It might look something like \" Step 3. H.D. The entire engine code contains the assembly plant, month and day. Chevy V8 Block Casting Number Locations. Chevy Camaro Big Block Engine Suffix Codes The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. Clutch (31-32-36-3800), DA -- 265 8cyl Trademaster w/ Hydramatic Trans (34-35-3700), DB -- 265 8cyl Trademaster w/ H.D. In mid-1965, the Mark IV series was introduced into production and has remained since. Gen I small-block Chevy engine. and P.G. & 2BC (C10,20,30 P20,30), ZC -- 350 8cyl w/ M.T. The following numbers are the day, followed by the month. 1961. Six Cylinder: Passenger side of the block behind the distributor. & 2BC (C10,20,30 P20,30), ZB -- 350 8cyl w/ M.T. The prefix portion of the ID code tells you the engine assembly plant code, and the engine’s assembly date (for example, 0701 = July 1st….no year is indicated). 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. & 4BC (C10,20,30 P20,30), WL -- 350 8cyl w/ PG & 4BC (C10,20,30 P20,30), WM -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), WK -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), WP -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), WQ -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), XC -- 350 8cyl w/ PG & 4BC (C10,20,30 P20,30), XD -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), XY -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), XZ -- 350 8cyl w/ PG & 4BC (C10,20,30 P20,30), WA -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), WH -- 350 8cyl w/ M.T. GM body designation. Year: Code: Model: CID: HP: Trans: Comment/RPO: 1961: Q: Impala: 409: 360: 4sp: 580, HP Solid Cam/11.25 Chevy Camaro Big Block Engine Suffix Codes. The prefix code is identified by the first few letters. For 1958-65 Chevrolet 6 cylinder & Smallblock V8 (this chart also includes 1965 396 engines) The suffix code for 6 cylinder engines can be found stamped on a pad near the distributor. and Powerglide(C10), YS -- 327 8cyl w/ Manual Trans (C10,20,30), YD -- 327 8cyl w/ A.I.R. (C20,30), XG -- 396 8cyl w/ 3sp Auto Trans & A.I.R. 1962. As new castings are released on late models keep your eyes open for the new numbers. (31-32-36-3800), JF -- 235 6cyl w/ Hydramatic Trans (31-32-36-38-4000), K -- 235 6cyl Thriftmaster w/ 3sp. For example, a prefix code of T1218: "T" stands for town of Tonawanda, 1218 stands for Dec. 18. H.D. (G10,20), WH -- 283 8cyl w/ A.I.R. and Powerglide (P10), SW -- 250 6cyl w/ A.I.R. TAX=application code Block Date code, example, A012 A=month block was cast 01=day block was cast 2=year block was cast If your block is from a car it will have a partial VIN number stamped on the pad, near the engine ID number. For help go to engine code help. or 3sp Automatic (C10,20), UU -- 292 6cyl w/ P.G. (C10,20), XH -- 396 8cyl w/ 3sp Automatic Trans (C20), XK -- 396 8cyl w/ Manual Trans & 2BC (C10,20), XN -- 396 8cyl w/ Manual Trans & 2BC (C20,30), XL -- 396 8cyl w/ 3sp Auto Trans & 2BC (C10,20), XM -- 396 8cyl w/ 3sp Auto Trans & 2BC (C20), PE -- 250 6cyl w/ Manual Trans (C10,20 K10,20), PP -- 250 6cyl w/ Manual Trans (P10,20,30), PQ -- 250 6cyl w/ Manual Trans (P10,20,30), PW -- 250 6cyl w/ Powerglide or T.H.400 (C10,20,30 K10,20 P20,30), PX -- 250 6cyl w/ Powerglide or T.H.400 (C20,30 K20 P20,30), RB -- 292 6cyl w/ T.H.400 (C20,30 K20 P20,30), RD -- 292 6cyl w/ T.H.400 (C10,20,30 K10,20), RE -- 292 6cyl w/ Manual Trans (C20,30 K20 P20,30), RG -- 292 6cyl w/ Manual Trans (C10,20,30 K10,20), UB -- 307 8cyl w/ Manual Trans (C20 P20,30), UC -- 307 8cyl w/ Powerglide (C10,20 P20), UE -- 307 8cyl w/ T.H.400 (C20,30 P20,30), UM -- 307 8cyl w/ T.H.350 or T.H.400 (C10), UN -- 307 8cyl w/ T.H.400 (C10,20,30, P20,30), ZA -- 350 8cyl w/ M.T. & 2BC (C10,20,30 P20,30), ZE -- 350 8cyl w/ M.T. Small Block Chevrolet engine suffix codes. Suffix codes for 6 cylinder and small block Chevy passenger car engines. Big Block Chevrolet casting number. clutch or 4sp Trans (C10,20,30,K10,20), PG -- 292 6cyl w/ Manual Trans (C10,20,30,K10,20), M -- 283 8cyl w/ Manual Trans (C10,20,30,K10,20), FG -- 153 4cyl w/ Powerglide and Pos. and Powerglide (P10), TA -- 250 6cyl w/ Manual Trans (C10,20 K10,20), TE -- 250 6cyl w/ P.G. Check that you can see the entire engine block stamp. and P.G. The codes contain a prefix and suffix that will identify where the engine was built and on what day; the engine type will also be indicated in the code. and Powerglide (C10), YH -- 327 8cyl w/ 3sp Automatic (C20,30), SS -- 230 6cyl w/ A.I.R. or 3sp Automatic (C10,20,30), TF -- 250 6cyl w/ H.D. Grab these three numbers. Big Block Chevy: Machined pad in front of the passenger side cylinder head or above timing chain cover. The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. Choose Group to View Big Block Engine Suffix Codes. big block Chevrolet engine suffix codes by minuit10 . & 4BC (C10,20,30 P20,30), XO -- 350 8cyl w/ T.H.400 & 4BC (C10,20,30 P20,30), WI -- 350 8cyl w/ M.T. and 3sp Automatic (C10,20), WC -- 283 8cyl w/ 3sp Automatic Trans (C20), YD -- 327 8cyl w/ A.I.R. (C10,20), WR -- 283 8cyl w/ A.I.R. 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. (C10,20,30), WR -- 307 8cyl w/ 3sp Automatic Trans (C20,30), ZY -- 307 8cyl w/ 3sp Automatic Trans (K20), WP -- 307 8cyl w/ 3sp Automatic Trans (P20,30), ZX -- 307 8cyl w/ 3sp Automatic Trans (K10,20), YK -- 327 8cyl w/ 3sp Automatic Trans (C10,20), YV -- 327 8cyl w/ 3sp Automatic Trans (C10,20), YH -- 327 8cyl w/ 3sp Automatic Trans (C20,30), YT -- 327 8cyl w/ 3sp Automatic Trans (K10,20), YU -- 327 8cyl w/ 3sp Automatic Trans (K20), YM -- 327 8cyl w/ 3sp Automatic Trans (P20,30), XE -- 396 8cyl w/ Manual Trans & A.IR. Engine Assembly Date/Suffix Code: The engine assembly code looks similar to this: T0601ED. For help go to engine code help . External site for 73-87 pickup (C10/20, K10/20) engines. or 3sp Automatic (P20,30), UH -- 292 6cyl w/ Manual Trans (C10,20,30 K10,20,), UT -- 292 6cyl w/ P.G. If you're looking at the engine code - this is already known. The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. Chevy II: 396: 375: Mt: L-89 SHP: 1971: CLA: Chevelle: 402: 300: TH400: LS-3: 1972: CLA: Chevelle: 396: 240: Mt: LS-3: 1971: CLA: Monte Carlo: 396: 300: Mt: LS-3: 1972: CLA: Camaro: 402: 240: Mt: LS-3: 1971: CLA: Monte Carlo: 402: 300: Mt: LS-3: 1972: CLA: Camaro: 396: 240: Mt: LS-3: 1972: CLA: Chevelle: 402: 240: Mt: LS-3: 1971: CLA: Chevelle: 396: 300: Mt: LS-3: 1972: CLB: Chevrolet: 396: 210: Mt: LS-3: 1971: … Look at the first digit, which will be a capital letter. So, ‘H’ would represent Holley, and ‘R’ would represent Rochester. Starting in 1970, the 454 big-block V8 engine made its way into many Chevrolet-branded high-performance passenger cars. This third character represents the carburetor type that was to be used on that engine. H.D. and Automatic Trans (C10,20), SX -- 250 6cyl w/ A.I.R. and Powerglide (C10), SX -- 250 6cyl w/ A.I.R. Numéro figurant à l'arrière du moteur côté boîte de vitesse: accueil engine code. The 348 and 409 are exclusive to the "W" series, but the 427 is a crossover used in both series. The entire engine code contains the assembly plant, month and day. 580, HP Solid Cam/11.25. Year: Code: Model: CID: HP: Trans: Comment/RPO: 1961: Q: Impala: 409: 360: 4sp: 580, HP Solid Cam/11.25 Clutch and 4sp Trans (C10,20 K10,20), UN -- 250 6cyl w/ A.I.R. If you don't know where to look on your engine for all of the casting numbers, casting dates and suffix codes, see Chevy V-8 Casting Number Locations Page 1 and Page 2. and P.G. Big Block Chevy Suffix Codes: AAA - CTB Abbreviations: AB = Air Brakes, AR = Air Injector Reactor, CA = California, HD = Heavy Duty, hdc = heavy duty clutch, HP = High Performance, LP = Liquid Propane Gas, PG = Powerglide, mt = manual trans, mt-3, 3 speed manual, SHP = Special High Performance, TH = Turbo Hydramatic, ti = transistor ignition. Choose Group to View Big Block Engine Suffix Codes. Thriftmaster (31-32-36-3800), HD -- 235 6cyl Thriftmaster w/ Hydramatic Trans (31-32-36-38-4000), HE -- 235 6cyl Thriftmaster w/ H.D. Big Block Chevy: Machined pad in front of the passenger side cylinder head or above timing chain cover. Chevrolet Truck Engine Code page under construction . Step 3. Clutch (31-32-36-38-4000), J -- 235 6cyl Thriftmaster w/ 3sp. The code is stamped above the timing chain cover on big block V8 engines. Year: Code: Model: CID: HP: Comment/RPO/Remark: 1990: 0FC: Marine: 502: 380: LX-2 4 bolt Inboard & 4BC (C10,20,30 P20,30), XB -- 350 8cyl w/ M.T. 409. Dedicated to the preservation and enjoyment of all stock, modified, and custom 1964 - 1987 Chevelles & El Caminos and P.G. Some codes are used for more than one model year and some for more than one platform such as Passenger, Chevelle, Camaro, Nova or Corvette. Big Block Chevy Suffix Codes: CTH - IJ. This engine Casting number is usually found at the rear of the block on the left or drivers side on top of the bellhousing flange. Clutch (P10), K -- 235 6cyl Thriftmaster special (P20,30), KA -- 235 6cyl Thriftmaster special w/ Hydramatic(P20,30), M -- 283 8cylTrademaster (C10,20,30,K10,20), JB -- 235 6cyl Thriftmaster w/ Powerglide (C10,20), JC -- 235 6cyl Thriftmaster w/ H.D. Six Cylinder: Passenger side of the block behind the distributor. Step 2. Vent (C10,20), RU -- 164 6cyl w/ Manual Trans Hi Perf (R10), RX -- 164 6cyl w/ Powerglide Hi perf (R10), SG -- 194 6cyl w/ Manual Trans (G1205,06,26), SI -- 194 6cyl w/ Powerglide (G1205,06,26), TA -- 230 6cyl w/ 3sp Trans (C10,20 K10,20), UH -- 292 6cyl w/ Manual Trans (C10,20,30,K10,20), WA -- 283 8cyl w/ Manual Trans (C10,20,30,K10,20), SD -- 194 6cyl w/ A.I.R. & 2BC (C10,20,30 P20,30), ZI -- 350 8cyl w/ M.T. Big Block Chevy: Machined pad in front of the passenger side cylinder head or above timing chain cover. For help go to engine code help. & 4BC (C10,20,30 P20,30), WO -- 350 8cyl w/ M.T. and P.G. HR - TBS TBT - TJS TJT - TXB TXC - UTT UTU - ZY: Chevrolet Suffix Engine big block : 0FC - 9XZ AAA - CTB CTH - IJ IK - … Big Block Chevy: Above timing chain cover. The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. & 4BC (C10,20,30 P20,30), YR -- 396 8cyl w/ Manual Trans (C10,20,30,), This is the content for Layout Div Tag "LayoutDiv19", This is the content for Layout Div Tag "LayoutDiv20", This is the content for Layout Div Tag "LayoutDiv21", This is the content for Layout Div Tag "LayoutDiv22", This is the content for Layout Div Tag "LayoutDiv24", This is the content for Layout Div Tag "LayoutDiv30", This is the content for Layout Div Tag "LayoutDiv31". Clutch (31-32-36-38-4000), J -- 235 6cyl Thriftmaster w/3sp. All these are identified here. Block casting number, example, 3970010 Engine ID number, example, V0101TAX V=engine assembly plant 01=month of assembly 01=day of assembly TAX=application code Block Date code, example, A012 A=month block was cast 01=day block was cast 2=year block was cast If your block is from a car it will have a partial … Decipher the remainder of the numbers of the Chevy big block engine. For help go to engine Code help or engine decoding FAQ. & 4BC (C10,20,30 P20,30), XW -- 350 8cyl w/ M.T. Clutch (C10,20,30,K10,20), MX -- 283 8cyl w/ Manual Trans and Pos. The suffix portion tells you the original application, vehicle model, engine RPO/ … Clutch and 4sp Trans (C10,20,30), SW -- 250 6cyl w/ A.I.R. Some very early smallblocks from the mid 1950 model years had an Engine Assembly Date which only included the last two digits of the year. and Powerglide (P10), SU -- 230 6cyl w/ A.I.R. and Powerglide (G10), SS -- 230 6cyl w/ A.I.R. 330864.....68-84...oval...OPEN...396, 402, 366T, 427T, 454 Truck 330865.....68-84...oval...OPEN...396, 402, 366T, 427T, 454 Truck 330866.....68-78...oval...OPEN...366T, 427T 330867.....68-73...oval...OPEN...427T 336765.....68-78...oval...OPEN...427T 336768.....73-76...oval...OPEN...427T 336781.....73-85...oval...OPEN...454, 118cc chamber, 256/114cc ports 343771.....68-86...oval...OPEN...366T, 427T, 454 343772.....68-86...oval...OPEN...366T, 427T, 454 … All these are identified here. The entire engine Code contains the assembly plant, month and day along with the engine suffix Code. The plant where the Chevy big block engine was manufactured is the first character. This drawing is of the 1967 version of the 302 cid Chevrolet. 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