needs to be in this order.
pump, out the tank, into the vette filter/regulator part, return goes back to the tank and the feed line goes to the fuel rail.
or, if you have two fuel lines, pump, out the tank, into the 3/8" inch line, then back out the 5/16" line and to the tank.
the regulator will take care of the fuel pressure going to the engine.
if you lines are tight and you use high pressure fuel injection line, it won't blow apart.