Best Seller | 1979-1986 Ford Mustang Heater Core - Autopart Premium Ford Mustang Heater Core. Brand: Autopart Premium. Fits Years: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 79, 80, 81, 82, 83, 84, 85, 86. HVAC Heater Core -- It fits the model with A/C System HVAC Heater Core for Ford Mustang Thunderbird Mercury... ... more 1979-1986 Ford Mustang Heater Core - Autopart Premium Ford Mustang Heater Core. Brand: Autopart Premium. Fits Years: 1979, 1980, 1981, 1982, 1983, 1984, 1985, 1986, 79, 80, 81, 82, 83, 84, 85, 86. HVAC Heater Core -- It fits the model with A/C System HVAC Heater Core for Ford Mustang Thunderbird Mercury... Partsgeek.com | | $38.95 FREE shipping go to store |