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 DELUXENO. |
CYL |
RATIO |
||||
JZ JM JP JN |
6 8 8 8 |
198 215 215 215 |
135 155 145 200 |
8.8:1 9.0:1 7.6:1 11.0:1 |
2BC 2BC 2BC 4BC |
MAN/AUTO MAN/AUTO MAN/AUTO MAN/AUTO |
NO. |
CYL |
RATIO |
||||
NO. |
CYL |
RATIO |
||||
JS JT JU |
8 8 8 |
401 401 401 |
265 325 315 |
9.0:1 10.25 8.75 |
2BC 4BC 4BC |
MAN/AUTO MAN/AUTO MAN/AUTO |
NO. |
CYL |
RATIO |
||||
JU |
8 |
401 |
315 |
8.75:1 |
4BC |
AUTO |
NO. |
CYL |
RATIO |
||||
JU JW |
8 8 |
401 425 |
315 340 |
8.75:1 10.25:1 |
4BC 4BC |
AUTO AUTO |