He turned his mechanical wizardry to motor sports in 1957 at Galesburg Speedway and went on to be the winning mechanic in over 150 races. His sharp skills kept Johncock's number 85 super modified at the front of the pack in the early 1960's. Duane was the winning mechanic on Johncock's super modified on such famous tracks as Oswego, New York; Winchester, Indiana; Eldora, Ohio; and Williams Grove, Pennsylvania.
He was the rookie mechanic of the year in the 1965 Indianapolis 500, and the 1967 overall mechanic. He retired in 1975.