Guys ive just finished my lastest mod . A double fuel system stock tank and intank pump 94 gas and a 10 gal. race cell w c-16 117ocatane gas. With a paxton inline for that . From in side the car you can shut down the tank pump and turn on the cell pump. Also using a two way swith for a ford ranger lets you switch the return line to the tank or cell. One way valves from Goodridge prevents backflow when one pump is running and the other is not. I know other guys have done stuff like this in the past , ive never seen it firsthand myself . cant have these clowns in vettes and when the new Cobra comes out screwing with me you know . If any ones interested mail me for the part#s