Your Foxbody's HVAC system (that's heating, ventilation and air conditioning) is probably one of the furthest things from your mind. That is, until something goes wrong and you're freezing in January or roasting in July somewhere in your 79-93 Pony. So grab any and all of these great 79-93 Mustang HVAC parts and keep that vital system maintained to its fullest. Also, Mustang Serpentine Belts and Mustang Air, Oil and Fuel Filters are two other great maintenance items to make sure you have in good working order on your Foxbody.