1968 Chevrolet P10 Van Engine: 3.8L L6; Standard Rotation|Optional Non-Thermal Fan Clutch;. 1968 Chevrolet P10 Van Engine: 4.1L L6; Standard Rotation|Optional Non-Thermal Fan Clutch|w/ AC;. 1969 Chevrolet P10 Van Engine: 3.8L L6; Standard Rotation|Optional Non-Thermal Fan Clutch;.
