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1963-1974 Chevrolet C20 Pickup
Adapter Fitting 12AN To 3/4"NPT Aluminum Straight
and have dual (10-3/4" and 11-1/2") converter bolt patterns unless specified
Best when used with better heads
COMP Cams 3/8 Valve Stem Seals Umbrella Type H775C30S 1963-1974 Chevrolet C20 PickupTypically requiring no machine work, our 504 umbrella seals are a great option for stock guide applications with 3 8" valves needing a seal replacement. The COMP Cams philosophy has never changed: make the highest performing products possible and lead the industry in technological development. One thing COMP Cams has never forgotten: Performance is defined by what happens out on the race track. Because no matter what happens on a dyno or in a computer
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