Part Type: Engine Cooling Fan Clutch. 1967 Chevrolet G10 Van Engine: 4.1L L6; Standard Rotation; Non-Thermal Fan Clutch; w/o AC;. Standard Rotation Non-Thermal Fan Clutch. Fan Clutch. 1974 Chevrolet G10 Van Engine: 4.1L L6; Standard Rotation; Non-Thermal Fan Clutch; w/o AC;.