Decent original ported vacuum switch D7ZE A1A date code 9F8. Used on 81 mustang, 77 to 79 Ranchero, 80 to 81 t bird, 77 maverick,  78 79 LTD II, 77 to 81 truck F150 250 350, 79 Lincoln, 77 Comet, 78 to 83 cougar.  May fit several other years and models.