Well the Air Horn Bowl Vent on the Center Carburetor is Linkage actuated. What? Take a gander. You shove that go fast pedal to the floor and that shaft works the lever and lifts the seal off the vent. Pretty cool, huh. A big gapping hole to shoot fuel out if you got a broken brass float. That is just scary. Notice that N.O.S. Fuel Inlet Nut. Yes? It is an Inverted Flare, no Teflon Tape Morons!