Electric or Mech Fuel Pump? For a carb...

you can run an electric Facet style check valve pump before a mechanical pump. Neither one will care of the other is working. Blip the electric before you crank her over, then turn off. Could run the electric solo if the mechanical one fails. My Mazda had an OEM Facet style "jiggler" that I just replaced...after 240,000 miles. I think the thing just got some crud in it as the volume was about half what it should have been.