Brent,
I did use the second output of a Holley Fuel Pressure Regulator and fed a line to somewhere under the footbox before the line goes into the fuel filter and mechanical fuel pump. The Tee has a restrictor inside with a 1.2mm hole. This way y get the full fuel pressure to the webers, but as soon as I stop the engine the pressure drains away quickly through this "return" line. No need to feed a line back to the tank.
