I wouldn't say a huge difference. I've always thought of the F cam as more of a blower/nitrous cam and the X cam as more of a "some street/mostly strip" cam. With the mods you have down I'd use the X cam personally. And depending on what you want from your car that carb might be a little large too. Just a thought. Unless, of course, the heads are ported.
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1984 1/2 GT350 (#842 Hatchback w/ T-tops), 302HO, Comp cams Xtreme Energy cam, Carter 625cfm carb, Weiand Stealth intake, MSD distributor, MSD coil, FMS 9mm wires, 1 5/8" MAC unequal shorties, 2 1/2" MAC Prochamber H-pipe, Flowmaster 2 chambers, KYBs, 16"x8" 4 lug Cobra Rs, Falken 245/45ZR16s
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