His third USAC stock car win happened on June 5 in the following year at Texas World Speedway .
Darnell 's second USAC victory happened on the clay at the 100 - mile race at DuQuoin State Fairgrounds Racetrack on August 28 , 1976 .
Darnell 's USAC USAC stock car win happened on June 5 in the following year at Texas World Speedway .
Darnell 's second USAC victory happened on the clay at the 100 - mile race at DuQuoin State Fairgrounds Racetrack on August 28 , 1976 .