| Part Number | 12-994-9 | | Engine | 1955-1998 Chevrolet 262ci-400ci 8cyl. | | Grind Number | CS 304A-R6 .900 BC | | Description | |
| | Intake | Exhaust | | Valve Adjustment | 0.02 | 0.022 | | Gross Valve Lift | 0.63 | 0.63 | | Duration At 0.02 Tappet Lift | 304 | 308 |
| | Valve Timing At 0.02 | | | | Open | Close | | Intake | 46 | 78 | | Exhaust | 80 | 48 |
| | These Specs Are For The Cam Installed At 106 Intake CL | | Intake | Exhaust | | Duration At 0.05 | 268 | 270 | | Lobe Lift | 0.42 | 0.42 | | Lobe Separation | 106 |
| | Recommended Valve Springs | 938-16 |
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Chevy 262-400 Oval Track .900 Base Circle 304AR-6 Cam MECHANICAL ROLLER-Good for late models with very large engine on long track. |