Fuel pump Questions for Dany's Magnum swap.

Probably overkill at this point, but I run a carter mechanical with a holly red electric with 3/8” line. Super stable fuel supply. I ran a holley blue and a holley black at different times using the supplied regulators. Always had issues,looking back I’m sure it was the cheap regulator, but my current combination just flat out works and helps with priming the carb if it sits and the fuel evaporates. Also if the electric dies my car will run off the mechanical alone. Only to 4000rpm, but would get you home.