On October 27, 1973, Jay Signore's International Race of Champions - IROC - series debuts with a pair of races at the famed Riverside International Raceway.
The series - conceived by Roger Penske and the late Les Richter - featured 3 races in 2 days over October 27-28, 1973 and a 4th and champion-deciding race at Daytona during 1974 Speedweeks. The field included 12 superstar drivers driving matching Porsche 911 Carerras.
Source: Crunch22.blogspot.com
This pbase gallery includes several good photos from those early IROC races.
http://www.pbase.com/slidevalve911rsr/911rsr_factory_cars_iroc_misc_photos
Some video footage of those first couple of races. The video clip is primarily of driver introductions, but some highlights (or lowlights for some drivers) are included as part of the intros.
Race report from Daytona Beach Morning Journal :
Race 1:
Fin | Driver | Series |
1 | Mark Donohue | SCCA |
2 | Bobby Unser | USAC |
3 | Peter Revson | SCCA |
4 | George Follmer | SCCA |
5 | Denny Hulme | FIA |
6 | A.J. Foyt | USAC |
7 | Richard Petty | NASCAR |
8 | Roger McCluskey | USAC |
9 | David Pearson | NASCAR |
10 | Gordon Johncock | USAC |
11 | Bobby Allison | NASCAR |
12 | Emerson Fittipaldi |
FIA |
Race 2:
Fin | Driver | Series |
1 | George Follmer | SCCA |
2 | David Pearson | NASCAR |
3 | Emerson Fittipaldi | FIA |
4 | Peter Revson | SCCA |
5 | A.J. Foyt | USAC |
6 | Bobby Unser | USAC |
7 | Bobby Allison | NASCAR |
8 | Denny Hulme | FIA |
9 | Gordon Johncock | USAC |
10 | Richard Petty | NASCAR |
11 | Roger McCluskey | USAC |
12 | Mark Donohue | SCCA |
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Schaefer: It's not just for racing anymore.
updated by @tmc-chase: 10/27/17 10:02:18AM