| Year | Displacement (CID) | Bore (Inches) | Stroke (Inches) | Mains (Inches) |
| 1955 | 287 | 3.75 | 3.25 | 2.50 |
| 1956 | 317 | 3.9375 | 3.25 | 2.50 |
| 1957 | 347 | 3.9375 | 3.5625 | 2.623 |
| 1958 | 370 | 4.0625 | 3.5625 | 2.623 |
| 1959-1966 | 389 | 4.0625 | 3.75 | 3.00 |
| 1963-1966 | 421 | 4.09375 | 4.00 | 3.25 |
| 1963-1967 | 326 | 3.720 | 3.75 | 3.00 |
| 1967-1969 | 428 | 4.120 | 4.00 | 3.25 |
| 1967-1979 | 400 | 4.120 | 3.75 | 3.00 |
| 1968-1977 | 350 | 3.880 | 3.75 | 3.00 |
| 1970-1976 | 455 | 4.150 | 4.21 | 3.25 |
| 1977-1981 | 301 | 4.00 | 3.00 | 3.00 |
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