Pre bent fuel lines and electric pump recommendation

This pump will get it done.

[URL]https://walbrofuelpumps.com/walbro-gsl392-inline-fuel-255lph-pump.html.html[/URL]

Some folks even use a complete separate fuel system for the nitrous, pump and all. Just food for thought.
Run a return line or no? Going to run a regulator for my carb so should I do a return line to the tank or not?