I recently bought a new coil and distributer (mallory duel point) for my 53 flathead. i was having low end bogging problems. i thought that was the problem. i also rebuilt the carb. thinking that was it. because the right jet was dripping instead of spraying. well turns out it still does. could that be the problem? it also backfires now at highter revs. do i just need a new carb or something else? thanks.