Just after midnight, in February 1973, there was a battle being waged on a Daytona Beach, Florida race track.
All of the heavy-hitters from Lola, Mirage and Matra had fallen by the wayside. The two cars trading places were not factory entries, they were two very separate and independent teams: one, a Sunoco blue Penske car driven by Mark Donohue; the other, a red, white, and blue liveried Brumos car driven by Peter Gregg. Both were the new Carrera RSR, the race-prepared version of the brand new Carrera RS. With no team orders to get in their way, the drivers pushed each other hard, trading first and second place.
