366 - 454 Codes:  JA - MZ

Legend: A.I.R. = Air Injection Reactor, HD = Heavy Duty, HDC = Heavy Duty Clutch, PG = Powerglide, L89 = Aluminum Heads, MT = Manual Transmission, TH400 = Turbo Hydramatic 400 Transmission, TI = Transistor Ignition.

GM body platform letters A (Chevelle), B (Passenger), F (Camaro/Firebird), G (Malibu), X (Nova) = GM body platforms and are used instead of Passenger, Chevelle, etc. unless engine was only used in one particular model of a platform beginning in 1964.  Otherwise 'Passenger' is used for 1955-1963 model years.  police and Taxi imply passenger car unless otherwise noted.

(n/a = information not available) - [ Return to Engine Codes Index ]

Code Year CID HP Trans Comments
JA 1967 427 435 MT Corvette, Holley 3x2, A.I.R.
JA 1969 396 325 MT A
JB 1969 396 325 MT F
JC 1967 427 400 MT Corvette, Holley 3x2
JC 1969 396 350 MT A
JD 1967 427 400 PG Corvette, Holley 3x2
JD 1969 396 375 MT A
JE 1967 427 435 MT Corvette, Holley 3x2
JE 1969 396 350 TH400 A
JF 1967 427 400 MT Corvette, Holley 3x2, A.I.R.
JF 1969 396 350 MT F, X
JG 1967 427 400 PG Corvette, Holley 3x2, A.I.R.
JG 1969 396 325 TH400 F
JH 1967 427 435 MT Corvette, Holley 3x2, L89, A.I.R.
JH 1969 396 375 MT F, X
JI 1969 396 350 TH400 F, X
JJ 1969 396 375 MT F, L89
JK 1969 396 325 TH400 A
JL 1969 396 375 TH400 F, X
JM 1969 396 375 TH400 F, L89
JN 1969 396 265 MT B, 2-bbl
JO 1969 396 265 TH400 B, 2-bbl, police
JP 1969 396 265 n/a B, 2-bbl, police
JQ 1969 396 265 TH400 B, 2-bbl
JR 1969 396 265 MT B, 2-bbl, police, HDC
JT 1969 396 265 MT B, 2-bbl, HDC
JU 1969 396 325 MT F, HDC
JV 1969 396 325 MT A, HDC
KA 1969 396 350 MT A, X, HDC
KB 1969 396 350 MT A, HDC
KC 1969 396 375 MT F, X, HDC
KD 1969 396 375 MT A. HDC
KE 1969 396 375 MT F, HDC, L89
KF 1969 396 375 TH400 A
KG 1969 396 375 MT A, L89
KH 1969 396 375 TH400 A, L89
KI 1969 396 375 MT A, HDC, L89 *
KL 1969 396 375 MT F (unverified)
LA 1969 427 390 MT B
LB 1965 396 325 PG B, Holley
LB 1969 427 335 MT B
LC 1965 396 325 TH400 B, Holley
LC 1969 427 390 TH400 B
LD 1969 427 425 MT B
LE 1969 427 335 TH400 B
LF 1965 396 325 MT B, Holley
LF 1969 427 390 TH400 B, police
LG 1969 427 390 MT B, police
LH 1969 427 390 MT B, SS only
LI 1969 427 390 TH400 B, SS only
LJ 1969 427 335 TH400 B, police
LK 1969 427 335 MT B, police
LL 1969 427 390 TH400 Corvette
LM 1969 427 390 MT Corvette
LN 1969 427 400 TH400 Corvette, Holley 3x2
LO 1969 427 430 MT Corvette, Holley
LP 1969 427 435 MT Corvette, L89
LQ 1969 427 400 MT Corvette, Holley 3x2
LR 1969 427 435 MT Corvette, Holley 3x2
LS 1969 427 425 TH400 B
LT 1969 427 435 MT Corvette, HDC, Holley 3x2
LU 1969 427 435 MT Corvette, HDC, L89
LV 1969 427 430 TH400 Corvette, Holley
LW 1969 427 435 TH400 Corvette, L89
LX 1969 427 435 TH400 Corvette, Holley 3x2
LY 1969 427 335 MT B, police
LZ 1969 427 390 MT B, HDC, police
MA 1969 427 335 MT B, HDC
MB 1969 427 390 MT B, HDC
MC 1969 427 390 MT B, SS only
MD 1969 427 425 MT B, HDC
ME 1969 427 430 MT Corvette, L88
MG 1969 427 430 TH400 Corvette, L88
MH 1969 427 390 MT Corvette, TI
MI 1969 427 390 TH400 Corvette, TI
MJ 1969 427 400 TH400 Corvette, Holley 3x2, TI
MK 1969 427 400 MT Corvette, Holley 3X2, TI
ML 1969 427 430 MT F, COPO 9560
MM 1969 427 425 TH400 F, COPO 9560
MN 1969 427 425 MT F, COPO 9561
MO 1969 427 425 TH400 F, COPO 9561
MP 1969 427 425 TH400 A, COPO 9562
MQ 1967-68 396 375 MT F
MQ 1968 396 375 MT X
MQ 1969 427 425 MT A, COPO 9562
MR 1967 396 375 MT F, A.I.R.
MR 1968 396 350 TH400 F, X
MR 1969 427 430 MT Corvette, Holley
MS 1969 427   Corvette, COPO - No details
MT 1968 396 375 MT F, L89
MV 1968 427     F, COPO 9737 Yenko
MV 1969 427     F, COPO 9567
MW 1967 396 325 MT F
MW 1968 396 325 MT F
MX 1967 396 325 MT F, A.I.R.
MX 1968 396 350 MT F, X
MX 1969 427     F, COPO 9567
MY 1967 396 325 TH400 F
MY 1968 396 325 TH400 F
MZ 1967 396 325 TH400 F, A.I.R.

* Tonawanda does not show this engine in their production reports but information presented here is from Alan L. Colvin's "...by the numbers..." reference book.