Water Pump Pulley, 2 Groove, 5-13/16 Dia., For A/C or P/S, 65-70 Mustang, Each. Ford Mustang (1965, 1967-1970). 1965 Ford Mustang | 289 With AC, With or Without Power Steering, Alternators Only. 1965 Ford Fairlane | 289 With AC, Extra Cooling, 53 or 65 amp Alternator.