I followed the manufacturer's instructions , even though they didn't make a ton of sense to me. B.G. HR 240 pump.
-8 from tank to carbs , -8 to bypass regulator , which is past the carburetor and -10 return to the tank.
The pressure stays right where daddy likes it under load and not that I am at a level where it will make a big difference , but the fuel is always tank temperature , and doesn't head up sitting in the under hood area.
I insulated the lines where they are near potential heat sources , and I did that with my last deal that didn't use a return.
I never had a problem with re-starts or boiling fuel in that one either.