Mat, FWIW a Ford electric fuel pump will fit INSIDE the tank with no alteration to the tank. All changes are to the fuel gauge sender assembly- either early or late type. This has two advantages: the fuel itself is excellent soundproofing and there is no possibility of vapor-lock since the fuel is being pushed, not sucked. (Reasons why 100% of current cars use this method as OEM). And it works equally well for both carbureted and EFI systems. I converted our carbureted car 15 years ago and have yet to find a problem.
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