1968 Mustang (and Ford) Vacuum Diagrams
170 & 200 with Imco and auto trans w/o air conditioning
170 with Thermactor and manual trans
200 with Thermactor and manual trans
289 2V & 302 2V with Imco and auto trans, w/o air conditioning
289 2V & 302 2V with Imco, auto trans, and air conditioning
302 4V with Imco, auto trans, and air condtioning (except Fairlane)
289 and 302 with Thermactor, manual trans, and air conditioning
390 2V with Imco, auto trans, and air conditioning
390 2V (Premium Fuel) with Imco, auto trans, and air conditioning
390 GT with Thermactor and auto trans (except Falcon)
390 4V and 390 GT with Thermactor, manual trans, and air conditioning (except Falcon)
427 with Thermactor and auto trans, w/o air conditioning (except Falcon)
"Imco" is special emissions tuning, "IMproved COmbustion"
"Thermactor" is Ford smog pump
