BRAINERD, MN - JULY 30: Graham McRae in a Leda GM1 ahead of Peter Gethin's Chevron B24 early in Heat Two of the Minnesota Grand Prix of the L&M Continental Series (F5000) held in two heats on July 30, 1972 at Donnybrooke Raceway in Brainerd, Minnesota. (Photo by Alvis Upitis)