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cam break-in
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  1. Engine Building, Hi Performance
    I just upgraded my mostly stock early 327 250 HP. Replaced the PowerPack heads and stock cam with 461 heads and a flat tappet Comp Thumpr cam (kit). As recommended by Comp, I replaced the rocker studs with screw-in studs. Also as recommended by Comp, I used their 10W-30 break-in oil and for...
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