Any racing fan that lived in Southern California in the early 70s knew of the late, great Riverside International Raceway (RIR). And if you followed top-level Porsche racing during the same period, no matter where you’re from, likely knew of the International Race of Champions (IROC), and that for its first, and then-one-season only, was contested with a special batch of Carrera RSR 3.0s developed and produced by the Porsche factory for the IROC spec series.
A foundational element of this series’ magic is the dozen truly international champions that contested Season 1; (B)Allison, Donohue, Fittipaldi, Foyt, Follmer, Hulme, Johncock, McCluskey, Pearson, (R)Petty, Revson, and (B)Unser. F1, Can-Am, Trans-Am, Champ Car, Indy500 season championship, and race winners all.
