| Block Height | 9 |
| Fitment | Engine Specific |
| Bore | 4.155 |
| CID | 380 |
| CID | 407 |
| Comp Height | 1.125 |
| Comp Ratio @ 58cc | 15.2:1 |
| Comp Ratio @ 58cc | 16.2:1 |
| Comp Ratio @ 64cc | 13.8:1 |
| Comp Ratio @ 64cc | 14.7:1 |
| Comp Ratio @ 76cc | 11.7:1 |
| Comp Ratio @ 76cc | 12.4:1 |
| Dome Volume | 13 |
| Gram Weight | 466 |
| Oversize | 0.03 |
| Rod | 6 |
| Rod | 6.125 |
| Stroke | 3.5 |
| Stroke | 3.75 |