Description
| Block Height: | 9.000 |
| Bore – Actual: | 4.155 |
| Bore – Oversize: | .030 |
| Compression Height: | 1.062 |
| Compression Ratio – Actual: | 10.5 @ 76cc |
| Cylinder Head: | Chevrolet 20/30 23 |
| Displacement: | 421 |
| Dome Volume: | -5.0 |
| Piston Head Type: | Flat Top |
| Piston Pin Diameter: | 0.927 |
| Ring Set Recommended: | J10008-4155-5 |
| Rod Length: | 6.000 |
| Stroke: | 3.875 |
| Weight – Nominal: | 433 |
