David - either location should work. With the pump on the suction side, it lets you vent the Racor to get air out of it too.

Long term, I have a small 12V electric diaphragm pump I use to empty the fuel tank into containers when needed (e.g. dreaded diesel bug). It could also be used for priming if needed, but I have a hand pump on my Racor filter. To use the electric pump I disconnect the suction to the Racor and connect the pump there, then pump discharges fuel into containers. It plugs into a cigarette lighter connection on the power panel. Someday I plan on installing this permanently and wiring it to a power panel switch. Because the fuel lift pump has a diaphragm that could rupture and leak fuel into the crank case, I don't think the pump should be powered all the time, but in an emergency, I could bypass the fuel lift pump and use the electric pump to feed the HP fuel pump.