 On the final turn of the final lap, Duman's engine blew coming out of turn four, and he coasted across the finish line to finish 6th.The 1968 race would be his best result at Indianapolis, as just over a one-week later, Duman was killed in a crash at Milwaukee.Duman was the only USAC Champ Car driver to race a front-engine upright 'dirt-style' car on a road course (1965) and a rear-engine car in a USAC championship dirt car race (1966).