I'm trying to install a Holley 4781 double pumper. I have a Barry Grant electric fuel pump. Do I need to prime the carb float bowls first? How do I do that? I'm running the pump and pumping the pedal, but I'm only getting a minuscule squirt. Thanks. - Jim Jim Altemose, Long Island, NY '63 Polara 500 (Max Wedge), '65 Belvedere I (Street Wedge), '71 Bronco