5.2 5.9 magnum EFI plug and play harnesses

i run a 45psi pump (90 lincoln) in my tank and it feeds the magnum just fine (it was intended to feed a 5.0 ford efi after all). you do, though, need to pay attention to psi and volume of a pump. the factory regulator sends fuel back to the tank in excess of 39 psi, if youre using the factory rail as I do