Popping or a backfire through the exhaust can sometimes be caused by inadequate amounts of fuel. It sounds like you motor *might* be able to use 30lb injectors...but maybe not. Like White5.0 said, pull your plugs and look at the color(s) and go from thete.
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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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