I have a 48 Kaiser, the electric fule pump which the first owner installed is going bad, have bought a Airetex E8011 asked the clerk if I should have a pressure regulator, well his eyes crossed and he looked like a UFO had Landed, the other guy said you needed 12 volts, the pump has a min pressure of 5 lbs, max of 8 lbs. do I need the regulator if so does anyone have a part number or name, also is the E8011 the right pump?. Thanks, Harry