68 Tempest (submodel: Custom, Safari) Clockwise (Standard) Rotation; Thermal Fan Clutch; Severe Duty. 77 Ventura (submodel: Base, SJ) Clockwise (Standard) Rotation; Thermal Fan Clutch; Severe Duty. 87-88 R30 Silverado Clockwise (Standard) Rotation; Thermal Fan Clutch; Severe Duty.
