If your looking at the carb from the front....to the pass side of the fuel inlet is the vac port for the trans. the pass side center goes to the air cleaner. The center rear is for the brakes if you have power booster and it should have 2 ports. the smaller goes to the ported vac switch. the dist runs off the ported vac switch. You can get that from Ames or year one. Hope this helps you. Ray
