their are no really disadvantages or advantages to spraying with these cams. Both are good. The X pulls a little stronger up top because it's made for top end power. It has more lift .542 compared to the .512 lift on the F cam. You would likely make more power with the X. Considering of course if you get a good set of heads and have them ported and worked accordingly and the motor is set up ideally.
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68 Camaro
Gene Fulton 632ci Two stages of Jug
8.41 164mph Rockingham 1-26-03
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