| Cylinder Head Height |
| Standard |
5.51" (140.0 mm) |
| Minimum |
5.50" (139.7 mm) |
| Valve Seats |
| Intake Valve |
| Seat Angle |
45° |
| Seat Width |
.039-.059" (1.00-1.50 mm) |
| Seat Bore Diameter |
1.240" (31.50 mm) |
| Exhaust Valve |
| Seat Angle |
45° |
| Seat Width |
.051-.083" (1.30-2.10 mm) |
| Seat Bore Diameter |
1.102" (28.00 mm) |
| Valve Seat Inserts |
| Intake |
| Standard |
| Insert Diameter |
1.303" (33.10 mm) |
| Bore Diameter |
1.299" (33.00 mm) |
| Oversize 1 |
| Insert Diameter |
1.311" (33.30 mm) |
| Bore Diameter |
1.307" (33.20 mm) |
| Oversize 2 |
| Insert Diameter |
1.318" (33.50 mm) |
| Bore Diameter |
1.314" (33.40 mm) |
| Exhaust |
| Standard |
| Insert Diameter |
1.165" (29.60 mm) |
| Bore Diameter |
1.161" (29.50 mm) |
| Oversize 1 |
| Insert Diameter |
1.173" (29.80 mm) |
| Bore Diameter |
1.169" (29.70 mm) |
| Oversize 2 |
| Insert Diameter |
1.181" (30.00 mm) |
| Bore Diameter |
1.177" (29.90 mm) |
| Installed Height |
| Intake & Exhaust |
| Standard |
.283-.287" (7.2-7.3 mm) |
| Oversize 1 |
.291-.295" (7.4-7.5 mm) |
| Oversize 2 |
.299-.303" (7.6-7.7 mm) |
| Installing Temperature |
| Valve Seat Insert |
-240°F (-150°C) |
| Cylinder Head |
122°F (50°C) |
| Valve Guides |
| Valve Guide Inside Diameter |
| Standard |
.236" (6.00 mm) |
| Oversize 1 |
.240" (6.10 mm) |
| Oversize 2 |
.244" (6.20 mm) |
| Valve Guide Installed Height |
.531-.551" (13.0-14.0 mm) |
| Valve Stem-To-Guide Oil Clearance |
.031" (.80 mm) |