Reply to "Too much YouTube? I'm about to order a Holley Sniper EFI system"

An in-tank pump will fit in an unmodified tank. What's needed is to shorten the  steel fuel feed line inside by about the length of the pump and clamp the coupling lines tightly. Tie-wraps can help. If you use plastic lines, today's fuels will soon cause them to harden up, better supporting the pump weight so no metal pump bracket needed. Then you add a spade lug through-connector to the outside of the sender & seal it for a 12+ source to the pump.  Ground the other wire to the sender inside somewhere. You can cannibalize a sender off a Fiat- similar to the Pantera but a foot shorter. Ford pumps are not marked by output so a TBI pump that gives about 10-12 psi looks exactly like an EFI pump that gives 45-55 psi....