Fuel Return Line - Do I Need One?

Question: I also have 1974 Cuda 440 with a Quick fuel regulator.
This car now has the tank vapor line, fitted to an open tube that lays under the intake for evaporation. The regulator has an extra out, that I want to use an orifice 'd down fitting, connected to that vapor line and use it, after I disconnect from the separator tank. I will add some 1/4" steel tubing to reach to the sender's return fitting. NOW WHAT? is the best way to vent the gas tank from the tank's separator's vapor out fitting?? (answer?) A new 1/4" steel tube going up near the fill opening and back down to inside the frame, like my 68 cuda? (Thanks for reading this mess.)