| Top Surface Flatness (Maximum overall variation) | 0.003 Inch (in) | |
| Maximum Variation within any 2.0 inch diameter area | 0.0004 Inch (in) | |
| Measurement A | First reface | 0.0058 Inch (in) |
| Second additional reface | 0.0138 Inch (in) |
| Total Allowed | 0.0197 Inch (in) |
| Measurement B | | |
| Standard | 12.7165 +/- 0.0039 Inch (in) |
| First reface | 12.7106 +/- 0.0039 Inch (in) |
| Second reface | 12.6968 +/- 0.0039 Inch (in) |
| Surface finish requirements | | 60 - 126 Micro-Inches (micro-in) |
| Main Bearing Bore Diameter (Maximum, with bearing installed) | | 3.2719 Inch (in) |
| Camshaft Bore Diameter (Maximum) | | |
| No.1 only (without bushing) | 2.2543 Inch (in) |
| No.1 with bushing | 2.1312 Inch (in) |
| No.2 through No.7 | 2.1312 Inch (in) |
| Tappet Bore Diameter (Maximum) | | 0.632 Inch (in) |
| Cylinder Bore | | |
| Diameter (Maximum) | 4.0203 Inch (in) |
| Out of Round (Maximum) | 0.0015 Inch (in) |
| Taper (Maximum) | 0.003 Inch (in) |