|  | Big  Block Chevy Suffix Codes: Q - YZGM body designation. All these are identified here. Quickly, A = Chevelle, F = Camaro, X = Nova. If you're looking at the engine code - this is already known. 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. 
  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.Induction is one (1) 4 barrel carburetor unless specified.
 
| Code | Year | Model | CID | HP | Trans | Application |  | Q | 1961 | Impala | 409 | 360 | 4sp | 580, HP Solid Cam/11.25 |  | QA | 1961 | Impala | 409 | 360 | 4sp | 580, HP Solid Cam/11.25cr |  
  | QA | 1962 | Impala | 409 | 380 | 4sp | 580, HP Solid Cam/11.00cr |  
  | OA | 1963 | Impala | 409 | 400 | 4sp | L-31 |  
  | QA | 1964 | Impala | 409 | 400 | 4sp | L-31 |  
  | QB | 1962 | Impala | 409 | 409 | 4sp | 587 dual quad |  
  | QB | 1963 | Impala | 409 | 425 | 4sp | L-80 dual quad |  
  | QB | 1964 | Impala | 409 | 425 | 4sp | L-80 dual quad |  
  | QC | 1963 | Impala | 409 | 340 | 4sp | L-33 |  
  | QC | 1964 | Impala | 409 | 340 | 4sp | L-33 |  
  | QD | 1962 | Truck | 409 | 252 |  | 580, 60 |  
  | QD | 1963 | Truck | 409 | 252 |  | L-40 60 |  
  | QD | 1964 | Truck | 409 | 252 |  | L-40 60 |  
  | QD | 1965 | Truck | 409 | 252 |  | L-40 60 |  
  | QE | 1962 | Truck | 409 | 252 |  | 580, 60 |  
  | QE | 1963 | Truck | 409 | 252 |  | L-40 60 |  
  | QE | 1964 | Truck | 409 | 252 |  | L-40 60 |  
  | QE | 1965 | Truck | 409 | 252 |  | L-40 60 |  
  | QG | 1963 | Impala | 409 | 340 | PG | L-33 |  
  | QG | 1964 | Impala | 409 | 340 | PG | L-33 |  
  | QJ | 1963 | Truck | 409 | 252 |  | L-40 60 |  
  | QJ | 1964 | Truck | 409 | 252 |  | L-40 60 |  
  | QJ | 1965 | Truck | 409 | 252 |  | L-40 60 |  
  | QM | 1963 | Impala | 427 | 435 | 4sp | Z-11 Dual Quad HP Solid Cam |  
  | QN | 1964 | Impala | 409 | 400 | 4sp | L-31 TI |  
  | QP | 1964 | Impala | 409 | 425 | 4sp | L-80 Dual Quad TI |  
  | QQ | 1964 | Impala | 409 | 340 | 4sp | L-33 TI |  
  | QR | 1964 | Impala | 409 | 340 | PG | L-33 TI |  
  | T | 1958 | Truck | 348 | 230 |  | 576, 50 |  
  | T | 1959 | Truck | 348 | 230 |  | 576, 50 |  
  | TA | 1958 | Truck | 348 | 230 |  | 576, 50 |  
  | TA | 1959 | Truck | 348 | 230 |  | 576, 50 |  
  | TBG | 1970 | Truck | 402 | 310 | 400 | L-47 10, 20, 30 |  
  | TBH | 1970 | Truck | 402 | 310 |  | L-47 10, 20, 30 |  
  | TC | 1960 | Truck | 348 | 230 |  | 576, 50 |  
  | TC | 1961 | Truck | 348 | 230 |  | 576, 50 |  
  | TC | 1962 | Truck | 348 | 220 |  | 576, 50 |  
  | TC | 1963 | Truck | 348 | 220 |  | 576, 50 |  
  | TC | 1964 | Truck | 348 | 220 |  | 576, 50 |  
  | TCH | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TCJ | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TCK | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TCL | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TCM | 1970 | Truck | 366 | 235 |  | L-41 60 |  
  | TCN | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TCS | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TCT | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TD | 1960 | Truck | 348 | 230 |  | 576 50 |  
  | TD | 1961 | Truck | 348 | 230 |  | 576 50 |  
  | TD | 1962 | Truck | 348 | 220 |  | 576 50 |  
  | TD | 1963 | Truck | 348 | 220 |  | 576 50 |  
  | TD | 1964 | Truck | 348 | 220 |  | 576 50 |  
  | TDH | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TDJ | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TDK | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TDL | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TE | 1960 | Truck | 348 | 230 |  | 576 50 |  
  | TE | 1961 | Truck | 348 | 230 |  | 576 50 |  
  | TE | 1962 | Truck | 348 | 220 |  | 576 50 |  
  | TE | 1963 | Truck | 348 | 220 |  | 576 50 |  
  | TE | 1964 | Truck | 348 | 220 |  | 576 50 |  
  | TF | 1960 | Truck | 348 | 230 |  | 576 50 |  
  | TF | 1961 | Truck | 348 | 230 |  | 576 50 |  
  | TF | 1962 | Truck | 348 | 220 |  | 576 50 |  
  | TF | 1963 | Truck | 348 | 220 |  | 576 50 |  
  | TF | 1964 | Truck | 348 | 220 |  | 576 50 |  
  | THB | 1972 | Truck | 402 | 210 | 400 | L-47 30, fwd |  
  | TKA | 1971 | Truck | 402 | 310 |  | L-47 10, 20,30 |  
  | TKA | 1972 | Truck | 402 | 210 |  | L-47 10, 20 |  
  | TKA | 1982 | Truck | 454 | 210 |  | LE-8 VIN W, 20, 30 |  
  | TKB | 1971 | Truck | 402 | 310 | 400 | L-47 10, 20, 30 |  
  | TKB | 1972 | Truck | 402 | 210 | 400 | L-47 10, 20 |  
  | TKC | 1982 | Truck | 454 | 210 |  | LE-8 VIN W, 20, 30 |  
  | TKD | 1982 | Truck | 454 | 210 |  | LE-8 VIN W, 20, 30 |  
  | TKF | 1982 | Truck | 454 | 210 |  | LE-8 VIN W, 20, 30 |  
  | TKH | 1982 | Marine | 454 | 210 |  | LE-8 |  
  | TKH | 1982 | Truck | 454 | 210 |  | LE-8 VIN W, 20, 30 |  
  | TKM | 1972 | Truck | 402 | 210 |  | L-47 AR, 10, 20 |  
  | TKW | 1972 | Truck | 402 | 210 |  | L-47 20, 30 |  
  | TKX | 1972 | Truck | 402 | 210 | 400 | L-47 20, 30 |  
  | TLM | 1972 | Truck | 402 | 210 | 400 | L-47 AR, 10, 20 |  
  | TMC | 1970 | Truck | 366 | 235 |  | L-41 50, 60 |  
  | TMD | 1970 | Truck | 366 | 235 |  | L-41 50, 60 |  
  | TMF | 1970 | Truck | 366 | 235 |  | L-41 60 |  
  | TMG | 1970 | Truck | 366 | 235 |  | L-41 60 |  
  | TMH | 1970 | Truck | 366 | 235 |  | L-41 50, 60 |  
  | TMI | 1970 | Truck | 427 | 260 |  | L-43 60 |  
  | TPH | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N, fwd |  
  | TPJ | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | TPK | 1992 | Truck | 454 | 230 |  | L-19 TBI VIN N, fwd |  
  | TRA | 1973 | Truck | 454 | 240 |  | LS-4 VIN Z, L, AR, 20, 30 |  
  | TRB | 1973 | Truck | 454 | 240 | 400 | LS-4 VIN Z, L, AR, 20, 30 |  
  | TRB | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, Motorhome, 30 |  
  | TRC | 1973 | Truck | 454 | 250 |  | LS-4 VIN Z, L, AR, 20, 30 |  
  | TRC | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, fwd, 30 |  
  | TRC | 1980 | Truck | 454 | 225 |  | LE-8 VIN W, 20, 30 |  
  | TRD | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, fwd, 30 |  
  | TRF | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, fwd |  
  | TRF | 1980 | Truck | 454 | 225 |  | LE-8 VIN W, 20, 30 |  
  | TRH | 1973 | Truck | 454 | 240 | 400 | LS-4 VIN Z, L, 10, 20 |  
  | TRH | 1974 | Truck | 454 | 245 | 400 | LS-4 VIN Z, L, 10, 20 |  
  | TRH | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 30, fwd |  
  | TRH | 1980 | Truck | 454 | 225 |  | LE-8 VIN W, 30, fwd |  
  | TRJ | 1973 | Truck | 454 | 240 |  | LS-4 VIN Z, L, 20, 30 |  
  | TRJ | 1974 | Truck | 454 | 245 |  | LS-4 VIN Z, L, 20, 30 |  
  | TRK | 1973 | Truck | 454 | 240 | 400 | LS-4 VIN Z, L, 10, 20 |  
  | TRK | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, fwd |  
  | TRK | 1981 | Truck | 454 | 210 |  | LE-8 VIN W, AR, 20, 30 |  
  | TRL | 1973 | Truck | 454 | 240 | 400 | LS-4 VIN Z, L, AR, 10 |  
  | TRL | 1974 | Truck | 454 | 245 | 400 | LS-4 VIN Z,L, AR, 10, 20 |  
  | TRL | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, fwd |  
  | TRL | 1981 | Truck | 454 | 210 |  | LE-8 VIN W, AR, 20, 30 |  
  | TRM | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TRR | 1973 | Truck | 454 | 250 |  | LS-4 VIN Z, L, 20, 30 |  
  | TRR | 1979 | Truck | 454 | 205 | 400 | LF-8 VIN S, 10, 20 |  
  | TRS | 1979 | Truck | 454 | 205 | 400 | LF-8 VIN S, 20 |  
  | TRT | 1974 | Truck | 454 | 245 | 400 | LS-4 VIN Z, L,10, 20 |  
  | TRT | 1979 | Truck | 454 | 210 |  | LF-8 VIN S, 30 |  
  | TRU | 1974 | Truck | 454 | 245 | 400 | LS-4 VIN Z, L, 10, 20 |  
  | TRU | 1979 | Truck | 454 | 205 | 400 | LF-8 VIN S, 20, 30 |  
  | TRW | 1974 | Truck | 454 | 245 | 400 | LS-4 VIN Z, L, f.d, 20, 30 |  
  | TRW | 1979 | Truck | 454 | 210 | 400 | LF-8 VIN S, fwd, 20 |  
  | TRX | 1979 | Marine | 454 | 245 |  | LF-8 |  
  | TRX | 1974 | Truck | 454 | 245 | 475 | LS-4 VIN Z, L, Motorhome, fwd, 30 |  
  | TRX | 1979 | Truck | 454 | 210 | 400 | LF-8 VIN S, fwd, 30 |  
  | TRY | 1975 | Truck | 454 | 215 | 400 | LS-4 VIN Z, L, 10 |  
  | TRY | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TRZ | 1975 | Truck | 454 | 215 | 400 | LS-4 VIN Z, L, 20, 30 |  
  | TRZ | 1976 | Truck | 454 | 250 |  | LF-8 VIN Y, 20, 30 |  
  | TRZ | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TRZ | 1979 | Truck | 454 | 205 |  | LF-8 VIN S, 10, 20 |  
  | TSA | 1975 | Truck | 454 | 215 | 400 | LS-4 VIN Z, L, 20, 30 |  
  | TSA | 1976 | Truck | 454 | 250 |  | LF-8 VIN Y, 20, 30 |  
  | TSA | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSB | 1975 | Truck | 454 | 215 | 475 | LS-4 VIN Z, L, Motorhome, fwd |  
  | TSB | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 30 |  
  | TSC | 1975 | Truck | 454 | 215 | 400 | LS-4 VIN Z, L, 20, 30 |  
  | TSC | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSD | 1975 | Truck | 454 | 215 | 400 | LS-4 VIN Z, L, 20, 30 |  
  | TSD | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSF | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSH | 1975 | Truck | 454 | 215 | 475 | LS-4 VIN Z, L,	fwd |  
  | TSH | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSJ | 1975 | Truck | 454 | 215 | 475 | LS-4 VIN Z, L, 20, 30 |  
  | TSJ | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSK | 1975 | Truck | 454 | 215 | 475 | LS-4 VIN Z, L, 20, 30 |  
  | TSK | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSL | 1975 | Truck | 454 | 215 | 475 | LS-4 VIN Z, L, 20, 30 |  
  | TSL | 1976 | Truck | 454 | 250 |  | LF-8 VIN Y |  
  | TSL | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSM | 1975 | Truck | 454 | 215 | 475 | LS-4 VIN Z, L, 20, 30 |  
  | TSM | 1977 | Truck | 454 | 250 |  | LF-8 VIN S, 10 |  
  | TSR | 1977 | Truck | 454 | 250 | 400 | LF-8 VIN S, Motorhome, 30 |  
  | TSS | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TST | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TSU | 1978 | Truck | 454 | 250 |  | LF-8 VIN S, 20, 30 |  
  | TTW | 1970 | Truck | 366 | 235 |  | L-41 50 |  
  | TTX | 1970 | Truck | 366 | 235 |  | L-41 50, 60 |  
  | TTZ | 1970 | Truck | 427 | 260 |  | L-43 60 |  
  | TXA | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 20, 30 |  
  | TXB | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 20, 30 |  
  | TXF | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 30 |  
  | TYX | 1970 | Truck | 366 | 235 |  | L-41 50, 60 |  
  | TZB | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZC | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZD | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZF | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZG | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZH | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZJ | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZK | 1985 | Marine | 454 | 240 |  | LE-8 |  
  | TZK | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZL | 1985 | Marine | 454 | 240 |  | LE-8 |  
  | TZL | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | TZM | 1985 | Truck | 454 | 240 |  | LE-8 VIN W, 20, 30 |  
  | U | 1958 | Truck | 348 | 230 |  | 576 50 |  
  | U | 1959 | Truck | 348 | 230 |  | 576 50 |  
  | U2C | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 30 |  
  | U2D | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 30 |  
  | U2J | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 20, 30 |  
  | U2K | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 20, 30 |  
  | U2L | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 20, 30 |  
  | U2W | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 30 |  
  | U2Z | 1989 | Truck | 454 | 230 |  | L-19 TBI VIN N, 30 |  
  | UA | 1958 | Truck | 348 | 230 |  | 576 50 |  
  | UA | 1959 | Truck | 348 | 230 |  | 576 50 |  
  | UBA | 1983 | Truck | 454 | 230 |  | LE-8 VIN W, 20, 30 |  
  | UBB | 1983 | Truck | 454 | 230 |  | LE-8 VIN W, 20, 30 |  
  | UBC | 1983 | Truck | 454 | 230 |  | LE-8 VIN W, 20, 30 |  
  | UBD | 1983 | Truck | 454 | 230 |  | LE-8 VIN W, 20, 30 |  
  | UBF | 1983 | Marine | 454 | 230 |  | LE-8 |  
  | UBF | 1983 | Truck | 454 | 230 |  | LE-8 VIN W, 20, 30 |  
  | UBH | 1983 | Truck | 454 | 230 |  | LE-8 VIN W, 20, 30 |  
  | UCA | 1981 | Truck | 454 | 210 | 400 | LE-8 VIN W, 30, AR |  
  | UCB | 1981 | Truck | 454 | 210 |  | LE-8 VIN W, 30, AR |  
  | UCD | 1981 | Marine | 454 | 210 |  | LE-8 |  
  | UCD | 1981 | Truck | 454 | 210 |  | LE-8 VIN W, 30, fwd |  
  | UCH | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UCJ | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UCK | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UCL | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UCN | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UCS | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UCT | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UDL | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UPH | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N, fwd |  
  | UPJ | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N |  
  | UPK | 1993 | Truck | 454 | 230 |  | L-19 TBI VIN N, fwd |  
  | UXL | 1993 | Marine | 366 | 210 |  | LS-0 TBI 4 bolt |  
  | UXL | 1994 | Marine | 366 | 210 |  | LS-0 TBI 4 bolt |  
  | UYJ | 1993 | Marine | 366 | 210 |  | LS-0 TBI 4 bolt |  
  | WZ | 1966 | Truck | 366 | 222 |  | L-41 50 |  
  | XE | 1968 | Truck | 396 | 310 |  | L-66 AR, 10, 20 |  
  | XF | 1968 | Truck | 396 | 310 |  | L-66 20, 30 |  
  | XG | 1968 | Truck | 396 | 310 | 400 | L-66 AR, 10, 20 |  
  | XH | 1968 | Truck | 396 | 310 | 400 | L-66 20, 30 |  
  | XK | 1968 | Truck | 396 | 275 |  | L-66 2bbl, 10,20 |  
  | XL | 1968 | Truck | 396 | 275 | 400 | L-66 2bbl, 10,20 |  
  | XM | 1968 | Truck | 396 | 275 | 400 | L-66 2bbl, 20 |  
  | XN | 1968 | Truck | 396 | 275 |  | L-66 2bbl, 20, 30 |  
  | YA | 1966 | Truck | 366 | 222 |  | L-41 50 |  
  | YA | 1969 | Truck | 366 | 235 |  | L-41 50 |  
  | YB | 1966 | Truck | 366 | 222 |  | L-41 50 |  
  | YS | 1969 | Truck | 366 | 235 |  | L-41 60 |  
  | YC | 1969 | Truck | 366 | 235 |  | L-41 60 |  
  | YD | 1969 | Truck | 366 | 235 |  | L-41 Allison 60 |  
  | YG | 1966 | Truck | 366 | 222 |  | L-41 Allison 50 |  
  | YH | 1969 | Truck | 366 | 235 |  | L-41 Allison 60 |  
  | YI | 1969 | Truck | 366 | 235 | Mt | L-41 60 |  
  | YJ | 1969 | Truck | 366 | 235 |  | L-41 60 |  
  | YK | 1969 | Truck | 366 | 235 |  | L-41 60 |  
  | YM | 1965 | Truck | 348 | 220 | Mt | 50 |  
  | YO | 1965 | Truck | 348 | 220 | Mt | 50 |  
  | YP | 1965 | Truck | 348 | 220 | Mt | 50 |  
  | YP | 1969 | Truck | 396 | 310 | 400 | L-66 10, 20, 30 |  
  | YQ | 1965 | Truck | 348 | 220 | Mt | 50 |  
  | YQ | 1969 | Truck | 396 | 310 | 400 | L-66 20, 30 |  
  | YR | 1969 | Truck | 396 | 310 |  | L-66 10, 20, 30 |  
  | YS | 1969 | Truck | 396 | 310 |  | L-66 20, 30 |  
  | YT | 1966 | Truck | 366 | 222 |  | L-41 50 |  
  | YT | 1969 | Truck | 427 | 260 |  | L-43 60 |  
  | YU | 1969 | Truck | 427 | 260 |  | L-43 60 |  
  | YV | 1969 | Truck | 427 | 260 |  | L-43 60 |  
  | YW | 1969 | Truck | 427 | 260 |  | L-43 60 |  
  | YX | 1966 | Truck | 366 | 222 |  | L-41 50 |  
  | YZ | 1966 | Truck | 366 | 222 |  | L-41 50 |    |