BRAINERD, MN - JULY 30: David Hobbs on way to winning Heat One in a Lola T300 leads Peter Gethin and the field on first lap of Heat One 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)