Return style is the way to go. Not trying to knock what anyone else is doing but a factory in-tank fuel pump is
better in the long run. they are designed to run 300,000 miles and the in tank design will keep the pump cooler. You can cut your tank, or if you have a popular car, a tank will be available to install an in-tank pump. A Bosch 044 or a Denso unit off a mid 90's Supra will feed anything to about 700HP.
Put the pressure regulator after the carb.