Michigan: Mario Andretti, Vel's Parnelli Jones Racing, Eagle 74 Offenhauser, chases Wally Dallenbach, Patrick Racing, Eagle 74 Offenhauser.
Mario Andretti, Vel's Parnelli Jones Racing, Eagle 74 Offenhauser, chases Wally Dallenbach, Patrick Racing, Eagle 74 Offenhauser.