Most current pumps are designed to fit inside the tank and be cooled by the fuel. They also require
special wiring terminals that are usually a part
of the sending unit.
A good friend, RICHARD COLE (an outstanding metal
fabricator for McLaren Engines), modified a stock
tank by welding in a sump and mounted a Weldon EFI pump inside the tank that picked up fuel from
dual fine mesh high volume plastic pick-up screens.
He used a -6 bulkhead fitting mounted on the normal sending unit flange to get the fuel out
of the tank in the stock location. He also made special plastic terminals with metal pins to get
power from outside the tank inside to the fuel
pump.
He will use a stock efi regulator with a bypass function to maintain fuel pressure at the engine.
Tom V.