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ENGINE NUMBER
Along with the VIN number, the engine block is stamped with an engine production code. The code has a prefix series of letters and number that identifies the engine and year, then a four digit numberic production sequence. On the V-8 engines, the production code is stamped on the right front of the engine block opposite the VIN number. On the V-6 engine, the number is on the front of the block below the left cylinder head gasket.
SPECIAL & SPECIAL DELUXE
ENGINE
NO.
NO.
CYL
CID
H.P.
COMP.
RATIO
CARB.
TRANS.
JL
JZ
JM
JP
JN
6
6
8
8
8
198
198
215
215
215
135
135
155
145
200
8.8:1
8.8:1
9.0:1
7.6:1
11.0:1
2BC
2BC
2BC
2BC
4BC
MAN/AUTO
MAN/AUTO
MAN/AUTO
MAN/AUTO
MAN/AUTO
SKYLARK
ENGINE
NO.
NO.
CYL
CID
H.P.
COMP.
RATIO
CARB.
TRANS.
JN
8
215
200
11:1
4BC
MAN/AUTO
LESABRE
ENGINE
NO.
NO.
CYL
CID
H.P.
COMP.
RATIO
CARB.
TRANS.
JR
JS
JT
JU
8
8
8
8
401
401
401
401
280
265
325
315
10.25
9.0:1
10.25
8.75
2BC
2BC
4BC
4BC
MAN/AUTO
MAN/AUTO
MAN/AUTO
MAN/AUTO
INVICTA, ELECTRA 225 & WILDCAT
ENGINE
NO.
No.
CYL
CID
H.P.
COMP.
RATIO
CARB.
TRANS.
JT
JU
8
8
401
401
325
315
10.25:1
8.75:1
4BC
4BC
AUTO
AUTO
RIVIERA
ENGINE
NO.
No.
CYL
CID
H.P.
COMP.
RATIO
CARB.
TRANS.
JT
JU
JW
8
8
8
401
401
425
325
315
340
10.25:1
8.75:1
10.25:1
4BC
4BC
4BC
AUTO
AUTO
AUTO