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post #1 of 1 (permalink) Old 04-20-2016, 09:03 AM Thread Starter
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What are you guys running for spark plugs or recommend for a stock 455?

Thinking an ACDelco R45TSX Conventional. Anyone recommend RapidFire instead of conventional?
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  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, LeMans & GTO Engine Tuning and High Performance

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