If your block is from a truck, before the mid seventies, it won't have a partial VIN stamped on it. H.D. Step 2. The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. big block Chevy engine suffix codes by minuit10 . 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. Big Block Chevy V-8 Casting Numbers. 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. (C10,20), WR -- 283 8cyl w/ A.I.R. The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. 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 … 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’. (31-32-36-3800), JC -- 235 6cyl Thriftmaster w/ 3sp. The entire engine Code contains the assembly plant, month and day along with the engine suffix Code. Identifying a Chevy Big Block engine is simple once the codes are located on the engine and identifiers are translated. We are always looking for new castings numbers. 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. Clutch (31-32-36-38-4000), JA -- 235 6cyl Thriftmaster w/ Hydramatic Trans (34-35-3700), L -- 265 8cyl Trademaster (31-32-36-38-4000), LA -- 265 8cyl Trademaster w/ Hydramatic Trans (31-32-36-38-4000), LB -- 265 8cyl Trademaster w/ H.D. Small Block Chevrolet engine suffix codes. and Powerglide (C10), YH -- 327 8cyl w/ 3sp Automatic (C20,30), SS -- 230 6cyl w/ A.I.R. Dedicated to the preservation and enjoyment of all stock, modified, and custom 1964 - 1987 Chevelles & El Caminos and powerglide (P10), SP -- 250 6cyl w/ A.I.R. For help go to engine Code help or engine decoding FAQ. Quickly, A = Chevelle, F = Camaro, X = Nova. & 4BC (C10,20,30 P20,30), WN -- 350 8cyl w/ M.T. The entire engine code contains the assembly plant, month and day. Choose Group to View Big Block Engine Suffix Codes Select BB Suffix Group #* - B* C* - CZZ D* - FZZ G* - KZZ L* - SZZ T* - TZZ U* - ZZZ 348/409 396/402 427 454 502 HR - TBS TBT - TJS TJT - TXB TXC - UTT UTU - ZY: Chevrolet Suffix Engine big block : 0FC - 9XZ AAA - CTB CTH - IJ IK - … Year: Code: Model: CID: HP: Trans: Comment/RPO: 1973: AAA: Truck: 366: 200: Mt: L-86 AR, 60: 1973: AAS Chevrolet Truck Engine Code page under construction . 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. For help go to engine code help. If you're looking at the engine code - this is already known. Clutch and 4sp Trans (C10,20,30), SW -- 250 6cyl w/ A.I.R. 409. 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. This drawing is of the 1967 version of the 302 cid Chevrolet. (G10,20), TS -- 292 6cyl w/ A.I.R. The first series was the "W" series, which was used from 1958 until 1965. In mid-1965, the Mark IV series was introduced into production and has remained since. Engine Assembly Date/Suffix Code: The engine assembly code looks similar to this: T0601ED. Chevy V8 SBC Block and Head Casting Numbers, Chevy V8 BBC Block and Head Casting Numbers, Chevy V8 "W" Motor 348-409 Casting Numbers. 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 … The plant where the Chevy big block engine was manufactured is the first character. Suffix codes are listed in alphabetical order by year. (31-32-36-3800), JF -- 235 6cyl w/ Hydramatic Trans (31-32-36-38-4000), K -- 235 6cyl Thriftmaster w/ 3sp. Clutch and 4sp Trans (C10 K10), TK -- 250 6cyl w/ P.G. Six Cylinder: Passenger side of the block behind the distributor. Clutch (C10,20,30,40 K10,20), JH -- 235 6cyl Thriftmaster w/ Powerglide (P10), JK -- 235 6cyl Thriftmasterw/ H.D. The entire engine code contains the assembly plant, month and day. Chevrolet Suffix Engine Small block : 3N-CDR CE - CMJ CMK - CUD CUF - DTM DTR - HQ . 1968 MM 327 Powerglide 275 4 Chevy II/K-20 1968 YA 327 240 4 C-20 to 35 1968 YB 327 Powerglide 220 4 C-10 Six Cylinder: Passenger side of the block behind the distributor. Choose Group to View Big Block Engine Suffix Codes. (G10,20), SU -- 230 6cyl w/ A.I.R. Clutch (C10,20,30,K10,20), MX -- 283 8cyl w/ Manual Trans and Pos. Clutch (34-35-3700), H -- 235 6Cyl. 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 … & 2BC (C10,20,30 P20,30), ZF -- 350 8cyl w/ M.T. If you're looking at the engine code - this is already known. The following numbers are the day, followed by the month. and P.G. Decipher the remainder of the numbers of the Chevy big block engine. 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. & 2BC (C10,20,30 P20,30), ZE -- 350 8cyl w/ M.T. & 4BC (C10,20,30 P20,30), XB -- 350 8cyl w/ M.T. & 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. All these are identified here. The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. (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. 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). 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: … and P.G. Big Block Chevy Suffix Codes: CTH - IJ. Step 3. & 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. The entire engine code contains the assembly plant, month and day. It might look something like \" big block Chevy engine suffix codes . & 2BC (C10,20,30 P20,30), ZI -- 350 8cyl w/ M.T. 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. Engine Code Stamping Numbers. (C10,20), WW -- 283 8cyl w/ A.I.R. and 3sp Automatic (C10,20), VR -- 292 6cyl w/ A.I.R. Thanks! or 3sp Automatic (P20,30), UH -- 292 6cyl w/ Manual Trans (C10,20,30 K10,20,), UT -- 292 6cyl w/ P.G. 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 … & 2BC (C10,20,30 P20,30), ZD -- 350 8cyl w/ M.T. and Powerglide (P10), SU -- 230 6cyl w/ A.I.R. Grab these three numbers. (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. For help go to engine code help. The entire engine code contains the assembly plant, month and day. 580, HP Solid Cam/11.25cr. 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. Choose Group to View Big Block Engine Suffix Codes. and Powerglide (P10), SW -- 250 6cyl w/ A.I.R. & 4BC (C10,20,30 P20,30), XA -- 350 8cyl w/ M.T. QA. 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. and P.G. For help go to engine code help. 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 Chevrolet casting number. 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. 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