Valve Guide Bores
To ream valve guide bores for oversize valves use Tool J-7049 for 396" and 427" engines.
VALVE SPRINGS
| Engine | Free Length | PRESSURE (LBS.) | |
|---|---|---|---|
| Valve Closed | Valve Open | ||
| 1968-69 | |||
| 396"(325 HP) | 2.11" | 84-96 @ 1.88" | 210-230 @ 1.46" |
| (350, 375 HP) | 2.09" | 94-106 @ 1.88" | 303-327 @ 1.38" |
| 427" | |||
| (385, 390, 400, 425 HP) | 2.09" | 94-106 @ 1.88" | 303-327 @ 1.38" |
| (435 HP) | 2.21" | 64-81 @ 1.88" | 181-205 @ 1.32" |
| Inner | |||
| Spring | 2.12" | 37-45 @ 1.78" | 92-1.10 @ 1.22" |
| 1970 | |||
| 396"(402") & 400"(402") | 2.12" | 69-81 @ 1.88" | 228-252 @ 1.38" |
| 454" | |||
| (345 HP) | 2.09" | 94-106 @ 1.88" | 303-327 @ 1.38" |
| (360, 390, 450 HP) | 2.12" | 69-81 @ 1.88" | 228-252 @ 1.38" |
| (460 HP) | 2.12" | 69-81 @ 1.88" | 181-205 @ 1.32" |
| Inner | |||
| Spring | |||
| 454"(460 HP) | .......... | 37-45 @ 1.78" | 92-100 @ 1.22" |
| All Others | .......... | 26-34 @ 1.78" | 81-99 @ 1.28" |
| 1971 | |||
| 402, 454" | |||
| Outer | 2.12" | 69-81 @ 1.88" | 228-252 @ 1.38" |
| Inner | 2.06" | 26-34 @ 1.78" | 81-99 @ 1.28" |
| 1972 | |||
| 402" & 454" | |||
| Outer | 2.12" | 69-81 @ 1.875" | 228-252 @ 1.375" |
| Inner | 2.06" | 26-34 @ 1.781" | 81-99 @ 1.28" |
| 1973 | |||
| 454" | 2.10" | 74-86@1.88" | 288-312@1.38" |