| Block Height | 9 |
| Fitment | Engine Specific |
| Bore | 4.125 |
| CID | 374 |
| CID | 401 |
| Comp Height | 1.125 |
| Comp Ratio @ 58cc | 15.1:1 |
| Comp Ratio @ 58cc | 16.1:1 |
| Comp Ratio @ 64cc | 13.7:1 |
| Comp Ratio @ 64cc | 14.6:1 |
| Comp Ratio @ 76cc | 11.5:1 |
| Comp Ratio @ 76cc | 12.3:1 |
| Dome Volume | 13 |
| Gram Weight | 448 |
| Gram Weight | 448! |
| Oversize | STD |
| Rod | 6 |
| Rod | 6.125 |
| Stroke | 3.5 |
| Stroke | 3.75 |