I personally like the idea of using the stock 5/16" line as a fuel return. It's already there, well-routed & simple.

70 Roadrunner convt. street car 440+6, NOS, 4-spd, SS springs '96 Mustang GT convt. street car '04 4.6 SOHC, NOS, auto, lowered "Officer, that button is for short on-ramps"