There are a few ways to do the return, and if you end up wanting to do it I can help.
Basically it's just a second small orificed tube off of what otherwise looks like a regular fuel filter and you run a line back to the tank from that.
It lets whatever fuel the carb does'nt need flow back to the tank.
Way less vaporlock and fuel boiling possibilities, and the plus for you would be that there would be no pressure in your fuel line after the car was off.
