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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 1972Chevelle
402
240
MtAR
CTH 1972Chevelle
396
240
MtAR
CTJ 1972Monte Carlo
402
210
TH 
CTJ 1972Chevelle
396
240
THAR
CTJ 1972Chevrolet
402
210
MtAR
CTJ 1972Chevrolet
396
210
MtAR
CTJ 1972Chevelle
402
240
THAR
CTJ 1972Monte Carlo
396
210
TH 
CTW 1970Chevy II
396
350THHP
CTW 1970Chevy II
396
375
THSHP
CTW 1970Camaro
396
350THHP
CTW 1970Chevelle
396
350THHP
CTX 1970Chevy II
396
350MtHP
CTX 1970Chevelle
396
350MtHP
CTX 1970Camaro
396
350MtHP
CTY 1970Camaro
396
375
THSHP
CTY 1970Chevelle
396
375
THSHP
CTZ 1970Chevelle
396
350MtHP
CTZ 1970Chevy II
396
350MtHP
CWA 1974Chevelle
454
235
Mt 
CWA 1973Chevelle
454
250
Mt 
CWB 1973Chevelle
454
250
TH 
CWB 1973Monte Carlo
454
245
TH 
CWC 1973Chevelle
454
250
MtCA
CWD 1974Monte Carlo
454
235
TH 
CWD 1973Chevrolet
454
250
THCA
CWD 1973Chevelle
454
250
THCA
CWD 1974Chevelle
454
235
THCA
CWD 1973Monte Carlo
454
245
THCA
CWI 1973Chevrolet
454
250
THCA
CWK 1973Chevrolet
454
250
TH 
CWL 1973Chevrolet
454
250
TH 
CWM 1973Corvette
454
275
Mt 
CWM 1974Corvette
454
270
Mt 
CWR 1974Corvette
454
270
TH 
CWR 1973Corvette
454
275
at 
CWS 1973Corvette
454
275
atCA
CWS 1974Corvette
454
270
THCA
CWT 1973Corvette
454
275
MtCA
CWT 1974Corvette
454
270
Mt 
CWU 1974Chevrolet
454
235
THPolice
CWW 1974Chevrolet
454
235
THCA Police
CWX 1974Monte Carlo
454
235
TH 
CWX 1974Chevelle
454
235
TH 
CWY 1974Chevrolet
454
235
THCA
CXA 1974Chevrolet
454
235
THCA
CXB 1974Chevrolet
454
235
THCA
CXC 1974Chevrolet
454
235
THCA
CXK 1975Chevrolet
454
215
TH 
CXL 1975Chevrolet
454
215
TH 
CXM 1974Chevelle
454
235
Mt 
CXR 1974Monte Carlo
454
235
TH 
CXR 1974Chevelle
454
235
TH 
CXS 1974Chevelle
454
235
TH 
CXS 1974Monte Carlo
454
235
TH 
CXT 1974Chevrolet
454
235
TH 
CXU 1974Chevrolet
454
235
TH 
CXW 1975Chevelle
454
215
TH 
CXX 1976Chevrolet
454
225
THLS4
CXX 1975Chevrolet
454
215
TH 
CXY 1975Chevrolet
454
215
TH 
CZL 1970Corvette
454
465
MtHD
CZN 1970Corvette
454
465
THHD
CZU 1970Corvette
454
390
MtHP
ED 1968Chevelle
396
325
Mt 
ED 1966Chevelle
396
325
Mt 
ED 1967Chevelle
396
325
Mt 
EF 1967Chevelle
396
350MtHP
EF 1966Chevelle
396
360
MtHP
EF 1968Chevelle
396
350MtHP
EG 1967Chevelle
396
375
MtSHP
EG 1966Chevelle
396
375
MtSHP
EG 1968Chevelle
396
375
MtSHP
EH 1966Chevelle
396
325
Mt 
EH 1967Chevelle
396
325
Mt 
EI 1967Camaro
396
350 HP
EJ 1967Chevelle
396
350MtHP
EJ 1966Chevelle
396
360
MtHP
EK 1967Chevelle
396
325
PG 
EK 1966Chevelle
396
325
PG 
EK 1968Chevelle
396
325
PG 
EL 1967Chevelle
396
350PGHP
EL 1968Chevelle
396
350PGHP
EL 1966Chevelle
396
360
PGHP
EM 1966Chevelle
396
325
PG 
EM 1967Chevelle
396
325
PG 
EN 1967Chevelle
396
350PGHP
EN 1966Chevelle
396
360
PGHP
EQ 1967Camaro
396
350atTH
ET 1968Chevelle
396
325
TH 
ET 1967Chevelle
396
325
TH 
EU 1968Chevelle
396
350THHP
EU 1967Chevelle
396
350THHP
EV 1967Chevelle
396
350THHP
EW 1967Chevelle
396
350THHP
EX 1967Chevelle
396
375
MtSHP
EY 1967Camaro
396
350 HP AR
IA 1965Chevrolet
396
325
Mt 
IA 1968Chevrolet
427
425
MtSPH
IA 1967Chevrolet
396
325
Mt 
IA 1968Chevrolet
395
325
Mt 
IA 1966Chevrolet
396
325
Mt 
IB 1968Chevrolet
427
385
THPolice
IB 1966Chevrolet
396
325
Mt 
IB 1967Chevrolet
396
325
MtAR
IC 1966Chevrolet
396
325
PGAR
IC 1967Chevrolet
396
325
PG 
IC 1965Chevrolet
396
325
Mtti
ID 1968Chevrolet
427
425
MtSHP
ID 1966Chevrolet
427
425
MtSHP
ID 1967Chevrolet
427
425
MtSHP
IE 1965Chevrolet
396
425
MtSHP
IE 1968Chevrolet
427
385
Mt 
IE 1967Chevrolet
427
385
MtImpala SS
IF 1965Corvette
396
425
Mt 
IF 1968Chevrolet
396
325
THPolice
IF 1967Chevrolet
427
385
THAR Impala SS
IG 1968Chevrolet
396
325
PG 
IG 1965Chevrolet
396
325
PG 
IG 1967Chevrolet
396
325
PGAR
IG 1966Chevrolet
396
325
PG 
IH 1966Chevrolet
427
390
Mt 
IH 1968Chevrolet
427
385
Mt 
IH 1967Chevrolet
427
385
MtAR
II 1967Chevrolet
427
385
MtAR
II 1966Chevrolet
427
390
MtAR
II 1965Chevrolet
396
325
PGti
IJ 1968Chevrolet
427
385
TH 
IJ 1966Chevrolet
427
390
TH 
IJ 1967Chevrolet
427
385
THAR

 

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