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Big Block Chevy Suffix Codes: IK - MZ

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
IK 1967Chevrolet427425MtAR SHP
IK 1968Chevrolet396325mt-3Police
IK 1966Corvette427425MtSHP
IL 1968Corvette427390Mt 
IL 1966Corvette427390Mt 
IL 1967Corvette427390Mt 
IM 1966Corvette427390Mt 
IM 1967Corvette427390Mt 
IM 1968Corvette427400MtHP
IN 1968Chevrolet396325PGPolice
IN 1966Chevrolet396325TH 
IN 1967Chevrolet396325THAR
IO 1968Chevrolet427425MtSHP
IO 1967Chevrolet427385THAR
IO 1966Chevrolet396325TH 
IO 1968Corvette427400THHP
IP 1966Corvette427425MtSHP
IQ 1968Corvette427390TH 
IQ 1966Corvette427390PG 
IQ 1967Corvette427390PG 
IR 1966Corvette427390PGAR
IR 1968Corvette427435MtSHP
IR 1967Corvette427390PG 
IS 1967Chevrolet427385THAR Impala SS
IS 1968Chevrolet427385TH 
IT 1968Corvette427435MtSHP
IT 1967Corvette427435MtSHP
IU 1968Corvette427435MtSHP
IU 1967Corvette427435MtSHP
IV 1966Chevrolet396325TH 
IV 1968Chevrolet396325TH 
IV 1967Chevrolet396325THAR
IV 1965Chevrolet396325TH 
IW 1965Chevrolet396325TH 
IX 1967Chevrolet427385MtAR Impala SS
JA 1967Corvette427435MtSHP
JA 1969Chevelle396325Mt 
JB 1969Camaro396325MT 
JC 1967Corvette427400Mt 
JC 1969Chevelle396350MtHP
JD 1967Corvette427400PG 
JD 1969Chevelle396375MtSHP
JE 1969Chevelle396350THHP
JE 1967Corvette427435MtSHP
JF 1967Corvette427400Mt 
JF 1969Chevy II396350MtHP
JF 1969Camaro396350MtHP
JG 1969Camaro396325TH 
JG 1967Corvette427400PG 
JH 1969Chevy II396375MtSHP
JH 1967Corvette427435MtSHP
JH 1969Camaro396375MtSHP
JI 1969Chevy II396350THHP
JI 1969Camaro396350THHP
JJ 1969Camaro396AHMt 
JK 1969Chevelle396325TH 
JL 1969Camaro396375THSHP
JL 1969Chevy II396375THSHP
JM 1969Camaro396 THalum hd
JM 1969Chevy II396 TH 
JN 1969Chevrolet396265Mt 
JO 1969Chevrolet396265THPolice
JP 1969Chevrolet396265 Police
JQ 1969Chevrolet396265TH 
JR 1969Chevrolet396265MtPolice, hdc
JT 1969Chevrolet396265Mthdc
JU 1969Camaro396325Mt 
JU 1969Chevy II396 PG 
JV 1969Chevelle396325Mt 
KA 1969Chevy II396350MtHP
KA 1969Camaro396350MtHP
KB 1969Chevelle396350MtHP
KC 1969Chevy II396375MtSHP
KC 1969Camaro396375MtSHP
KD 1969Chevelle396375MtSHP
KE 1969Camaro396 Mtalum hd
KE 1969Chevy II396 Mt 
KF 1969Chevelle396375THSHP
KG 1969Chevelle396 Mtalum hd
KH 1969Chevelle396 THalum hd
KI 1969Chevelle396 Mtalum hd
LA 1969Chevrolet427390MtHP
LB 1969Chevrolet427335Mt 
LB 1965Chevrolet396325PG 
LC 1969Chevrolet427390THHP
LC 1965Chevrolet396325TH 
LD 1969Chevrolet427425MtSHP
LE 1969Chevrolet427335TH 
LF 1969Chevrolet427390THHP Police
LF 1965Chevrolet396325Mt 
LG 1969Chevrolet427390MtHP Police
LH 1969Chevrolet427390MtHP
LI 1969Chevrolet427335TH 
LJ 1969Chevrolet427335THPolice
LK 1969Chevrolet427335MtPolice
LL 1969Corvette427390THHP
LM 1969Corvette427390MtHP
LN 1969Corvette427400THHP
LO 1969Corvette427430MtHD
LP 1969Corvette427435Mtalum hd
LQ 1969Corvette427400MtHP
LR 1969Corvette427435MtSHP
LS 1969Chevrolet427425THSHP
LT 1969Corvette427435MtSHP
LU 1969Corvette427435Mtalum hd
LV 1969Corvette427430THHD
LW 1969Corvette427435THalum hd
LX 1969Corvette427435THSHD
LY 1969Chevrolet427335MtPolice
LZ 1969Chevrolet427390MtHP Police
MA 1969Chevrolet427335Mt 
MB 1969Chevrolet427390MtHP Police
MC 1969Chevrolet427390MtHP
MD 1969Chevrolet427425MtSHP
ME 1969Corvette427430Mt 
MG 1969Corvette427430at 
MH 1969Corvette427390Mt 
MI 1969Corvette427390at 
MJ 1969Corvette427400at 
MK 1969Corvette427400Mt 
MQ 1968Chevy II396375MtHP
MQ 1968Camaro396375Mt 
MQ 1967Camaro396375Mt 
MR 1967Camaro396375Mt 
MR 1968Chevy II396350THHP
MR 1968Camaro396350TH 
MR 1969Corvette427430Mt 
MS 1969Corvette427  Questionable
MT 1968Camaro396375Mt 
MW 1968Camaro396325Mt & at 
MW 1967Camaro396 Mt 
MX 1968Camaro396350Mt 
MX 1967Camaro396  AR
MX 1968Chevy II396350MtHP
MY 1967Camaro396325TH 
MY 1968Camaro396325TH 
MZ 1967Camaro396325TH 


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