I ran a blue with two Holley regulators with no issues.......for a lot of years.
It got busy as far as plumbing.......from the pump to a Y block on the fender well , regulator on each output into lines that came in to an aluminum block I made that had two inlets and outlets and the pressure gauge pick up point in it.
The block was mounted on the carb heat shield.
I seem to remember reading that the volume restriction was in the regulator and that was what pushed me in that direction.
Stepped up a bit on this deal , but knowing what I know now I think a return system regardless of who's pump is the way to go.