my walbro in my thunderbird isnt loud at all! before the old one went bad u could hear it from standing ouside the car, it was a dreadful noise but it didnt effect the way the car drove! i replaced it before it actually went out!
your fuel sender needs cleaning/tightening. Remove the fuel pump/sender, and pry the cover off the rheostat for the fuel sender. It's either dirty, or the swingarm contct from the float is no touching it at all times/ in all positions.