Watkins Glen 6 Hours: Jo Siffert / Gijs van Lennep, J.W. Automotive Engineering, Porsche 917 K battles with Bill Schumacher / Bob McClure / Bob Kiefer, Iroquois Racing Associates, Chevrolet Corvette.
Jo Siffert / Gijs van Lennep, J.W. Automotive Engineering, Porsche 917 K battles with Bill Schumacher / Bob McClure / Bob Kiefer, Iroquois Racing Associates, Chevrolet Corvette.