electric vs mechanical fuel pump

Quality OEM type Carter fuel pumps are avail' at RockAuto.com The later model pump will have its outlet connection in a different location but... If you can reroute the fuel line from that pump to your carb including relocating the fuel filter as factory did in later models, it will work better. Later model thicker base gasket under the carb also recommended.
If you're not wiling to rework theat fuel line, order the correct pump for your application. Thicker base gasket still recommended and wont make a heck of a lot of difference at install. You only need to readjust the bends in the choke heater rod.