Watkins Glen
Richard Attwood, J.W. Automotive, Porsche 917 K, leads Sam Posey, North American Racing Team, Ferrari 512 M, Tony Adamowicz, Auto World, McLaren M8B Chevrolet, Derek Bell, J.W. Automotive, Porsche 917 K, and Bob Bondurant, Motschebacher Racing, McLaren M8E/D Chevrolet.