Sorry for the crappy picture. One thought, if your fuel pump seals well enough, you can use that as your fuel shut off at the tank and save yourself fire sleeving forward to the carbs (wired thru the master kill switch). On the sportster I have a pingel remote petcock, 8AN line to the pump (low center of the picture) then 6AN line up to a tee (behind the carb). Tee branches to the carb and the regulator and then returns to the tank after the regulator. All fittings were drilled and chamfered for more flow/less restriction. Previously I just dead headed to the regulator then out to the carb and that seemed to work just as well as returning to the tank.