Electric push through mechanical works for me ('47 Power Wagon). The stock fuel system was prone to vapor lock while running in hotter temps with today's fuel. Hot re-start not possible unless the fuel pump and nearby line was hosed down with cool water. Cold start after sitting required long crank times.

An auxiliary electric pump on a toggle switch mounted to the frame rail near the tank fixed all the above. It is a carb type electric pump set up with a bypass check valve so the engine mounted pump can draw fuel with electric pump off. The check valve is a 3/8" brass version from the hardware store. Other types are available.

Tests include 1) Run down the road in hot weather until she sputters and looses power. Turn electric pump on and smoothes right out 2) Hot re-start. Starts up quickly with electric pump on. Will not re-start with electric pump off. 3) start after sitting weeks or even months. Starts up promptly with electric pump on. Not so with pump off. Lots of cranking.

I kept the original fuel pump because it has integral filter, also since it is original style and because it is reliable in cooler weather.