4 Seasons Engine Cooling Fan Clutch For 1989-1991 Chevrolet R3500 5.7L V8

1989 Chevrolet R3500 Engine: 5.7L V8; Standard Rotation; Optional Heavy Duty Thermal Fan Clutch; OE Fan Clutch Height; Fan Mounting Holes are 5/16 In.;. 1990 Chevrolet R3500 Engine: 5.7L V8; Standard Rotation; Optional Heavy Duty Thermal Fan Clutch; OE Fan Clutch Height; Fan Mounting Holes are 5/16 In.;.