Three rounds of the 1975 series were championship races co-sanctioned by the United States Auto Club.
In 1979 he placed 9th in the USAC Mini Indy Super Vee series 8th in the SCCA Formula Super Vee Championship.
After further consideration, USAC officials calculated the true margin of victory to be narrower, at 0.0331 seconds.
Weld also founded Weld Wheel Industries, a firm manufacturing forged alloy wheels for various vehicles, including race cars, and was an active sponsor of both race cars and series, including the United States Auto Club series, and ran the firm until its acquisition by American Racing Equipment in 2006.
USAC rules at the time required drivers to be 21 years of age, but Garza's racing license listed him as being 22 years old.
He attempted to race in two CART Championship Car races in the fall of 1982 (during their split with USAC) at the Milwaukee Mile and Road America but failed to make the field in both races.
While the Indianapolis 500 had continued to be sanctioned by the United States Auto Club (USAC) since the formation of CART in 1979, CART teams and drivers represented the vast majority of the Indy field, and USAC had taken steps to ensure that the technical specifications for Indy did not preclude CART teams from participating.
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Hall would wind up getting 13 wins and 2 championships in USAC and CART sanction Indy car races.
In June 1981 Vetrock and his friend Larrie Ervin entered an aging chassis in the USAC "Gold Crown" Championship Car race at the Pocono Raceway and were invited to enter a car in the 1982 Indianapolis 500.
Malloy drove in the USAC Championship Car series, racing in the 1967-1972 seasons, with 61 career starts, including the 1968-1971 Indianapolis 500 races.
In addition to his racing career, in the early 1990s Chase worked as the head of stock car racing for A. J. Foyt Enterprises; he planned to attempt to qualify for the Indianapolis 500 on two occasions with the team, but was not approved by USAC for competition.