Magnum EFI Return or Returnless? & Vacuum Regulator Question

Got it. Thanks. Does the return line from engine bay back to fuel tank have to be EFI hose, or can it be standard fuel hose?
I guess I'm thinki
Just get an 92-94 Magnum Fuel Rail.

Its already setup for a return line AND,,this is the best part, it includes a integral vacuum reference regulator.
A new regulator is easily available and installs in about 2 min.

Then all you have to do is simply run the two line to the tank and filter and you're done.

View attachment 1715182572
That's something I hadn't thought of! So the vacuum reference regulator would go to my adjustable regulator vacuum input?