Fuel System design

Hoping to get some opinions and options.
I'm in the process of building a fuel deliviery system for my car.
The car is a 70 Dart Swinger with a approx 400 hp, single carb motor.
The plan so far is to run the stock tank with an upgraded to 3/8 pickup tube
and sock, canister filter, Holley blue pump, 3/8 steel tubing to the front,
then the regulator set to approx 6 psi.
Do you think a return is required or needed ? The +'s and -'s thereof?
The tank is vented through the filler neck.
Any and all opinions would be appreciated on the best design for this application.
Thanks,
Carl