I AM RUNNING 5.3L/LM7 TRUCK INTAKE, I ALREADY GOT A WALBRO GSL392 INLINE PUMP, BUT MY GAS TANK ONLY HAS FEED AND VENT LINE ONLY. HOW DO I RUN RETURN LINE? DO I RUN RETURN LINE BACK INTO FEED LINE BEHIND FUEL PUMP? -OR- DO I DRILL HOLE IN OLD ASSEMBLY(REMOVED of course) AND RUN RETURN LINE INTO TANK? remember the old tank on father/son project fuel system summary...my 1986 cutlass tank is just like it ](*,) ](*,)