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6x head

  1. 1976 built Pontiac 455 pinging!

    Hotrodding Basics
    I have a 1970 cadillac with a 455 pontiac motor in it. stock short block & rotating assembly, large cam, high rise intake manifold ported and polished matching the ported and polished 6x heads, roller rockers, hei distributor, electric feul pump, demon 850 carb with no choke on it. currently...