EFI Tank & Pump

Hello FABO Friends, I have a Tanks EFI fuel tank with a 67gph/255iph pump, can I get a return regulator for a carburetor and use it till I'm ready to put the MSD Atomic EFI unit on, I already have a return regulator for that. I'm rebuilding my 340 and I want to break it in with the carb and run it for awhile before I put the MSD on. I thought I could put the tank, fuel lines and such on the car while my block is being machined.

Thanks Jeff