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  1. 400 sbc running rough

    Engine
    Me and my son are building a mild street car from a 84 vette. We removed the old 350 and replaced it with a 400/406, it starts rite up and idle a little rough and when I step on it it seems to lose power? Here is a list of all that he and I have done 400sbc .30 over Summit cam (part# sum-1065)...
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