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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"