Watkins Glen 6 Hours: Robert R. Johnson / John Greenwood, John Greenwood Racing, Chevrolet Corvette leads Jo Siffert / Gijs van Lennep, J.W. Automotive Engineering, Porsche 917 K.
Robert R. Johnson / John Greenwood, John Greenwood Racing, Chevrolet Corvette leads Jo Siffert / Gijs van Lennep, J.W. Automotive Engineering, Porsche 917 K.