1973 Indianapolis 500

Al Unser Sr racing Parnelli Offenhauser #4 past grandstands, leading pack at Indianapolis Motor Speedway / Lee Kunzman racing Eagle Offenhauser #16 / Rear view Indy car pulling from pit stall, driving to re-enter race / Dan Gurney Racing Olsonite Eagle Offenhauser #48 /AJ Foyt or George Snider driving Coyote Foyt #84 through pits / driver stepping from race car, pit crew working / Jerry Grant stopping #48 in pits, crew pushing vehicle along, Jimmy Caruthers driving Cobre Special Eagle Offenhauser #21 through pits / Lee Kunzman driving #16 into pits, pit crew working / Johnny Rutherford driving Gulf sponsored McLaren Offenhauser #7 through pits /Graham McRae driving STP sponsored Eagle Offenhauser #60, Joe Leonard driving Samsonite sponsored Parnelli Offenhauser #1 through pits. 1973 Indianapolis 500 on May 30, 1973 in Indianapolis, Indiana (Footage by Getty Images)