planning out dual tank fuel system for LS swap

[kipps]

The corvette filter/regulator must have a return. On that regulator, the inlet and the outlet are directly connected to each other. The way it regulates the pressure, is by varying the amount of fuel allowed to go out the return outlet. If the pressure drops too low, the return outlet is blocked off. Is the pressure gets too high, the return outlet is opened up.

You will need a six-port selector valve. Three of the ports are switching the fuel inlet, and three of them are switching the return.

Also, those inline pumps don't like to suck fuel any distance at all, I'm told. I'd be skeptical about pulling through the selector valve and all associated piping.