David "Salt" Walther was a driver in the USAC and CART Championship Car series. He also drove NASCAR stock cars and unlimited hydroplane boats, and was a car owner in USAC. Walther is best remembered for a crash at the start of the 1973 Indianapolis 500 that left him critically injured. He recovered from his injuries, returned in 1974, and placed 9th in the 1976 race. He also co-drove a car with Bob Harkey to 10th place in 1975.

Leon Duray "Jigger" Sirois is an American former racing driver from the small town of Shelby in northern Indiana. He raced in a variety of racing genres, most notably midget, stock and Indy "Big" cars. Sirois is the son of former longtime veteran Indy 500 mechanic Earl "Frenchy" Sirois, who worked on the winning cars of Lee Wallard, Sam Hanks, and Jimmy Bryan during his 40 year career. Sirois is named after driver Leon Duray. The nickname "Jigger" is in reference to family friend, two-time Indy-winning riding mechanic Jigger Johnson, as well as a nickname given to him by his older sister.