I don't know if this belongs in this forum but here's what I'm trying to do.

If someone has done this already I can't find it, some links would be nice.

I want to put a second fuel cell in my trunk for race gas only and the be able to switch between the regular tank and the race gas fuel cell at the track. besides the plumbing and stuff I figured it'll be pretty straight foward by simply installing switches to both fuel pumps turning on the one i need and turning off the one I don't need. But for the fuel return how do i get the gas back into the right cell? Will this work?