Fuel pressure dropping while driving and under acceleration to zero at idle runs 4 lb electric Blue

Cool thanks.... What about the return? Should I take it from the front if need be and run it all the way back or plug it at the regulator and use the return on the fuel pump?

I prefer to run a separate return line and not use the bypass at the pump. It’s more work to do it that way, but IMO you want the pressure drop at the regulator and not the pump.