I have an electric fuel pump in series with both tanks (just after the
electrically operated valve) that I fill my junky ol' 2100 with gasoline
before turning on the starter.

I use the momentary-on button that used to operate the window washer. :)

My fuel pump is nothing special, heck it's a old 6 volt Bendix but it works
to help start my 2100 carb-ed engine. Even just sitting a few minutes
sometimes, the fuel pump runs quite a bit as if the fuel line pressure has
dropped or something.

Many times it fires up quicker than my '91 5.8 EFI.

I've modified a bunch of stuff on my pickup over 33+ years and that's been
one of the most useful. No kidding.

Alvin in AZ
ps- it's sat well over a month and still fired right up because of being able
to fill the carburetor up first and the 360FE isn't sensitive to old gasoline
either, like my old air cooled VW dune buggies etc were