EFI Fuel System

Fuel pump, I'd run the old reliable Walbro 255, they make an inline version.

https://aftermarket.tiautomotive.co...er=0&flow_rate=255&max_pressure=87&fuel_type=
You can run a "returnless" corvette regulator, they're pretty popular. Most new cars don't run a return system, they have a filter/regulator in the pump module run the system dead headed and it "returns" while still inside the tank. Only downside is the pressure is set at 58 psi. What system are you looking at? I see you said it requires 42-48.

https://help.summitracing.com/app/answers/detail/a_id/5380/~/what-is-the-corvette-style-fuel-system
Your other options is a regular return style regulator, but mounted out back. That's probably not the route I'd go, your return line can be the old 5/16 supply line and you can buy/bend a new 3/8 supply and mount a return reg up front.