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One other thing you have in the Ford over the Chevy is the lifter bore size. Ford .875" or GM .842", and since a flat tappet camshaft's design is based on lifter diameter. The larger the lifter diameter the faster the rate-of-lift that can be designed into the cam lobe. This doesn't really apply to roller cams though. On a side note, the Mopar bore is .904".
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Brent Dolphin
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