Im in the middle of a rebuild and am ditching the stock fuel rail and regulator. Do I need to run a Y block and feed each rail independently or can I feed one and attach to the other with a crossover line? My original thought was I come into the passenger rail with a -8 feed on the front side kinda like when it was stock, crossover to the driver side fuel rail on the back side, come out the front of the driver side rail with -8 to a regulator,then - 8 return to tank. Car is twin turbo with R block if that helps.