Theoretical Devil's advocate reporting for duty.
If the OP has the original tank behind the seat with the outlet at the bottom of the tank, he pretty much has a gravity feed gas tank when the tank is full.
With a
-a clean tank with no debris in the bottom of the tank,
-fully functional fuel pump,
-no leaks nor obstructions in the fuel lines,
-clean fuel filter.
-fully charged battery,
-fully functional starter motor,
-good clean wires of the proper gauge,
-and fully functional carburetor, an additional electric pump is not needed.
I recommend checking all of these items before buying an electric pump, even though the pump will likely "solve" your problem with starting. I am guessing that you have an issue with one of the items mentioned above.
BTW, what is a "two b halley"?
Or, everything written above can be ignored.

Respectfully,
Nellie