Pontiac GTO Forum - View Single Post - Exaust backfiring
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post #55 of (permalink) Old 04-02-2019, 12:50 PM
Join Date: Oct 2017
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What is your vacuum advance?

1965 GTO Convertible 3 speed tri-power drum brakes originally

Current setup:
400 cu in with tri-power
4 speed Muncie
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