1985 Ford Mustang Engine: 5.0L V8; Manual Transmission; w/Standard Duty Cooling | w/Air Conditioning;. 1986 Ford Mustang Engine: 5.0L V8; w/Standard Duty Cooling | w/Air Conditioning;. 1987 Ford Mustang Engine: 5.0L V8; w/Standard Duty Cooling | w/Air Conditioning;.