The1979 USAC Championship Car season consisted of seven races, beginning inOntario,California on March 25 and concluding inWest Allis,Wisconsin on August 12. TheUSAC National Champion wasA. J. Foyt and theIndianapolis 500 winner wasRick Mears. With the exception of the Indianapolis 500, most top drivers instead competed in races sanctioned byCART.
During the summer of 1979, after theCalifornia 500 switched alliances mid-season to become aCART series race,USAC proposed aLabor Day weekend race meet that would consist of aUSAC Stock Car/Championship Car doubleheader at theIndianapolis Motor Speedway. A 250-mile stock car race on Saturday would be followed by a 250-mile Indy car race on Sunday.[1][2] However, the plan never materialized.
^Snider switched to Hoffman Auto Racing for a special qualifying session for bumped cars at the Indy 500, after the #40 was withdrawn due to a blown engine.
^Used by Parsons at the 500 events and both Milwaukee races.
^Rasmussen switched to B/M Enterprises after a crash during Indy 500 practice.
^Jan Opperman took some laps for his refresher test at the Indy 500.
^Car loaned byPatrick Racing at the Indy 500 for Gehlhausen.
^Gehlhausen was bumped from the Indy 500 field and loaned the #90 car fromPatrick Racing, which he qualified. Later, the #19 was allowed to requalify in a special session, but it also failed to qualify with other drivers. For race day, the #90 was renumbered as #19.
^Eligible to score points at the Indy 500, as he had competed with USAC teams earlier in the year.
^George Snider practiced with the car at Indianapolis as a standby for a possible qualifying attempt after Ongais suffered a concussion in a crash.
^Alsup switched to Gehlhausen-Reath at the special qualifying session for bumped cars at the Indy 500, after his Penske ride was disqualified for a technical infringement.
^Alsup switched to a Penske Racing back-up car for Bump Day at the Indy 500.