| Block Height | 9.48 |
| Fitment | Engine Specific |
| Bore | 4.125 |
| CID | 427 |
| CID | 438 |
| Comp Height | 1.23 |
| Comp Ratio @ 56cc | 10.2:1 |
| Comp Ratio @ 56cc | 10.4:1 |
| Comp Ratio @ 60cc | 10:1 |
| Comp Ratio @ 60cc | 9.8:1 |
| Comp Ratio @ 64cc | 9.5:1 |
| Comp Ratio @ 64cc | 9.7:1 |
| Dome Volume | -30 |
| Gram Weight | 464 |
| Oversize | STD |
| Rod | 6.2 |
| Rod | 6.25 |
| Stroke | 4 |
| Stroke | 4.1 |