The fan clutch fits following car models:
Bel Air 1955-69
Chevelle 1964-68
Chevy II 1963-68
Impala 1959-63
Nova 1969-70
El Camino 1959-60, 1964-68
Ford Fairlane 1962-69
Ford Falcon 1960-70
Ford Mustang 1964-73, 1979
Ford Thunderbird 1961-85
Mercury Comet 1964-77
Mercury Cougar 1967-85
Fits further models - see specificacion below.

Technical specification
Centrifugal.
Fan Clutch Bolt Nut Type : 5/16"-18 Bolt
Fan Clutch Fan Mount Height : 1.75"
Fan Clutch Height : 3.33"
Fan Clutch Overall Diameter : 7.25"
Fan Clutch Pilot Depth : .75"
Fan Clutch Pilot Diameter : .63"/.75"
Fan Clutch Rotation : STD Or REV
Fan Clutch Type : B