Part Type: Engine Cooling Fan Clutch. Standard Rotation Thermal Standard Duty Fan Clutch. Fan Clutch. 1978 Chevrolet C10 Engine: 4.1L L6; Standard Rotation; Standard Duty Thermal Fan Clutch;. 1978 Chevrolet C10 Engine: 4.8L L6; Standard Rotation; Standard Duty Thermal Fan Clutch; w/o AC;.
