| Cyl. Engine Bore | Years Comp. Ratio | NOTES: | Part No. Sizes | Rings | O.E. Assy. No. | O.E. Casting No. | Head Shape |
L6 360 |
1989-94 |
Cummins Diesel 6BT turbo-charged and intercooled. |
5058D** |
Keystone |
4638653 |
102039 |
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V8 361 |
1960-77 |
Truck engine. 3" dia. head recess 1/8" deep. Replaces 1253D (Part No. change only). |
3219 |
2-3/32 |
2084357 |
1859335 |
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V8 383 |
1959-71 |
Flat head piston replacing both flat head and dished O.E. pistons. Not destroked when used in 1971 engines. |
1271 |
2-5/64 |
1879333 |
1858663 |
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V8 400 |
1972-80 |
Flat head. |
1274 |
2-5/64 |
3621356 |
3671052-3 |
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V8 413 |
1960-77 |
Truck engine. 3-1/4" dia. head recess 7/32" deep. |
1272D |
2-3/32 |
2084361 |
1944533 |
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V8 440 |
1966-71 |
Flat head piston replacing both flat head and dished O.E. pistons. |
1263 |
2-5/64 |
2585585 |
2536731-2 |
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V8 440 |
1966-71 |
Hypereutectic flat head. Not destroked. #: Discontinued upon depletion of stock. |
H1296# |
2-5/64 |
2585585 |
2536731-2 |
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V8 440 |
1972-80 |
Flat head. |
1276 |
2-5/64 |
3579047 |
3671217-8 |
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