Thursday 14th February 1974
Driving a Porsche 911 Carrera, Mark Donohue won the final race of the inaugural International Race of Champions, commonly called the IROC, at Daytona International Speedway in Daytona Beach, Florida. This victory, which clinched the first IROC championship for Donohue turned out to be his final victory in a race car as he was killed in a 1975 Formula One crash while testing for the Austrian Grand Prix.
