1967 Chevrolet G10 Van Engine: 4.1L L6; Standard Rotation; Optional Standard Duty Thermal Fan Clutch; w/o A/C;. Part Type: Engine Cooling Fan Clutch. 1968 Chevrolet G10 Van Engine: 4.1L L6; Standard Rotation; Optional Standard Duty Thermal Fan Clutch; w/o A/C;.