With an EFI pump, and bypass regulator with a carb, you have to run 1/2" line for both feed & return, or the return won't bypass enough (can't get psi down far enough for carb).
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1970 GTO Judge Tribute Pro-Tour Project 535 IA2
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1971 Trans Am 463, 315cfm E-head Sniper XFlow EFI, TKO600 extreme, 9", GW suspension, Baer brakes, pro tour car
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