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Big Block Chevy Suffix Codes: CTH - IJ
GM 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 |
| CTH |
1972 | Chevelle | 402 | 240 | Mt | AR |
| CTH |
1972 | Chevelle | 396 | 240 | Mt | AR |
| CTJ |
1972 | Monte Carlo | 402 | 210 | TH | |
| CTJ |
1972 | Chevelle | 396 | 240 | TH | AR |
| CTJ |
1972 | Chevrolet | 402 | 210 | Mt | AR |
| CTJ |
1972 | Chevrolet | 396 | 210 | Mt | AR |
| CTJ |
1972 | Chevelle | 402 | 240 | TH | AR |
| CTJ |
1972 | Monte Carlo | 396 | 210 | TH | |
| CTW |
1970 | Chevy II | 396 | 350 | TH | HP |
| CTW |
1970 | Chevy II | 396 | 375 | TH | SHP |
| CTW |
1970 | Camaro | 396 | 350 | TH | HP |
| CTW |
1970 | Chevelle | 396 | 350 | TH | HP |
| CTX |
1970 | Chevy II | 396 | 350 | Mt | HP |
| CTX |
1970 | Chevelle | 396 | 350 | Mt | HP |
| CTX |
1970 | Camaro | 396 | 350 | Mt | HP |
| CTY |
1970 | Camaro | 396 | 375 | TH | SHP |
| CTY |
1970 | Chevelle | 396 | 375 | TH | SHP |
| CTZ |
1970 | Chevelle | 396 | 350 | Mt | HP |
| CTZ |
1970 | Chevy II | 396 | 350 | Mt | HP |
| CWA |
1974 | Chevelle | 454 | 235 | Mt | |
| CWA |
1973 | Chevelle | 454 | 250 | Mt | |
| CWB |
1973 | Chevelle | 454 | 250 | TH | |
| CWB |
1973 | Monte Carlo | 454 | 245 | TH | |
| CWC |
1973 | Chevelle | 454 | 250 | Mt | CA |
| CWD |
1974 | Monte Carlo | 454 | 235 | TH | |
| CWD |
1973 | Chevrolet | 454 | 250 | TH | CA |
| CWD |
1973 | Chevelle | 454 | 250 | TH | CA |
| CWD |
1974 | Chevelle | 454 | 235 | TH | CA |
| CWD |
1973 | Monte Carlo | 454 | 245 | TH | CA |
| CWI |
1973 | Chevrolet | 454 | 250 | TH | CA |
| CWK |
1973 | Chevrolet | 454 | 250 | TH | |
| CWL |
1973 | Chevrolet | 454 | 250 | TH | |
| CWM |
1973 | Corvette | 454 | 275 | Mt | |
| CWM |
1974 | Corvette | 454 | 270 | Mt | |
| CWR |
1974 | Corvette | 454 | 270 | TH | |
| CWR |
1973 | Corvette | 454 | 275 | at | |
| CWS |
1973 | Corvette | 454 | 275 | at | CA |
| CWS |
1974 | Corvette | 454 | 270 | TH | CA |
| CWT |
1973 | Corvette | 454 | 275 | Mt | CA |
| CWT |
1974 | Corvette | 454 | 270 | Mt | |
| CWU |
1974 | Chevrolet | 454 | 235 | TH | Police |
| CWW |
1974 | Chevrolet | 454 | 235 | TH | CA Police |
| CWX |
1974 | Monte Carlo | 454 | 235 | TH | |
| CWX |
1974 | Chevelle | 454 | 235 | TH | |
| CWY |
1974 | Chevrolet | 454 | 235 | TH | CA |
| CXA |
1974 | Chevrolet | 454 | 235 | TH | CA |
| CXB |
1974 | Chevrolet | 454 | 235 | TH | CA |
| CXC |
1974 | Chevrolet | 454 | 235 | TH | CA |
| CXK |
1975 | Chevrolet | 454 | 215 | TH | |
| CXL |
1975 | Chevrolet | 454 | 215 | TH | |
| CXM |
1974 | Chevelle | 454 | 235 | Mt | |
| CXR |
1974 | Monte Carlo | 454 | 235 | TH | |
| CXR |
1974 | Chevelle | 454 | 235 | TH | |
| CXS |
1974 | Chevelle | 454 | 235 | TH | |
| CXS |
1974 | Monte Carlo | 454 | 235 | TH | |
| CXT |
1974 | Chevrolet | 454 | 235 | TH | |
| CXU |
1974 | Chevrolet | 454 | 235 | TH | |
| CXW |
1975 | Chevelle | 454 | 215 | TH | |
| CXX |
1976 | Chevrolet | 454 | 225 | TH | LS4 |
| CXX |
1975 | Chevrolet | 454 | 215 | TH | |
| CXY |
1975 | Chevrolet | 454 | 215 | TH | |
| CZL |
1970 | Corvette | 454 | 465 | Mt | HD |
| CZN |
1970 | Corvette | 454 | 465 | TH | HD |
| CZU |
1970 | Corvette | 454 | 390 | Mt | HP |
| ED |
1968 | Chevelle | 396 | 325 | Mt | |
| ED |
1966 | Chevelle | 396 | 325 | Mt | |
| ED |
1967 | Chevelle | 396 | 325 | Mt | |
| EF |
1967 | Chevelle | 396 | 350 | Mt | HP |
| EF |
1966 | Chevelle | 396 | 360 | Mt | HP |
| EF |
1968 | Chevelle | 396 | 350 | Mt | HP |
| EG |
1967 | Chevelle | 396 | 375 | Mt | SHP |
| EG |
1966 | Chevelle | 396 | 375 | Mt | SHP |
| EG |
1968 | Chevelle | 396 | 375 | Mt | SHP |
| EH |
1966 | Chevelle | 396 | 325 | Mt | |
| EH |
1967 | Chevelle | 396 | 325 | Mt | |
| EI |
1967 | Camaro | 396 | 350 | | HP |
| EJ |
1967 | Chevelle | 396 | 350 | Mt | HP |
| EJ |
1966 | Chevelle | 396 | 360 | Mt | HP |
| EK |
1967 | Chevelle | 396 | 325 | PG | |
| EK |
1966 | Chevelle | 396 | 325 | PG | |
| EK |
1968 | Chevelle | 396 | 325 | PG | |
| EL |
1967 | Chevelle | 396 | 350 | PG | HP |
| EL |
1968 | Chevelle | 396 | 350 | PG | HP |
| EL |
1966 | Chevelle | 396 | 360 | PG | HP |
| EM |
1966 | Chevelle | 396 | 325 | PG | |
| EM |
1967 | Chevelle | 396 | 325 | PG | |
| EN |
1967 | Chevelle | 396 | 350 | PG | HP |
| EN |
1966 | Chevelle | 396 | 360 | PG | HP |
| EQ |
1967 | Camaro | 396 | 350 | at | TH |
| ET |
1968 | Chevelle | 396 | 325 | TH | |
| ET |
1967 | Chevelle | 396 | 325 | TH | |
| EU |
1968 | Chevelle | 396 | 350 | TH | HP |
| EU |
1967 | Chevelle | 396 | 350 | TH | HP |
| EV |
1967 | Chevelle | 396 | 350 | TH | HP |
| EW |
1967 | Chevelle | 396 | 350 | TH | HP |
| EX |
1967 | Chevelle | 396 | 375 | Mt | SHP |
| EY |
1967 | Camaro | 396 | 350 | | HP AR |
| IA |
1965 | Chevrolet | 396 | 325 | Mt | |
| IA |
1968 | Chevrolet | 427 | 425 | Mt | SPH |
| IA |
1967 | Chevrolet | 396 | 325 | Mt | |
| IA |
1968 | Chevrolet | 395 | 325 | Mt | |
| IA |
1966 | Chevrolet | 396 | 325 | Mt | |
| IB |
1968 | Chevrolet | 427 | 385 | TH | Police |
| IB |
1966 | Chevrolet | 396 | 325 | Mt | |
| IB |
1967 | Chevrolet | 396 | 325 | Mt | AR |
| IC |
1966 | Chevrolet | 396 | 325 | PG | AR |
| IC |
1967 | Chevrolet | 396 | 325 | PG | |
| IC |
1965 | Chevrolet | 396 | 325 | Mt | ti |
| ID |
1968 | Chevrolet | 427 | 425 | Mt | SHP |
| ID |
1966 | Chevrolet | 427 | 425 | Mt | SHP |
| ID |
1967 | Chevrolet | 427 | 425 | Mt | SHP |
| IE |
1965 | Chevrolet | 396 | 425 | Mt | SHP |
| IE |
1968 | Chevrolet | 427 | 385 | Mt | |
| IE |
1967 | Chevrolet | 427 | 385 | Mt | Impala SS |
| IF |
1965 | Corvette | 396 | 425 | Mt | |
| IF |
1968 | Chevrolet | 396 | 325 | TH | Police |
| IF |
1967 | Chevrolet | 427 | 385 | TH | AR Impala SS |
| IG |
1968 | Chevrolet | 396 | 325 | PG | |
| IG |
1965 | Chevrolet | 396 | 325 | PG | |
| IG |
1967 | Chevrolet | 396 | 325 | PG | AR |
| IG |
1966 | Chevrolet | 396 | 325 | PG | |
| IH |
1966 | Chevrolet | 427 | 390 | Mt | |
| IH |
1968 | Chevrolet | 427 | 385 | Mt | |
| IH |
1967 | Chevrolet | 427 | 385 | Mt | AR |
| II |
1967 | Chevrolet | 427 | 385 | Mt | AR |
| II |
1966 | Chevrolet | 427 | 390 | Mt | AR |
| II |
1965 | Chevrolet | 396 | 325 | PG | ti |
| IJ |
1968 | Chevrolet | 427 | 385 | TH | |
| IJ |
1966 | Chevrolet | 427 | 390 | TH | |
| IJ |
1967 | Chevrolet | 427 | 385 | TH | AR |
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