BRAINERD, MN - JULY 30: George Follmer's Lotus 70B leads Eppie Wietzes' Lola T300 during 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)