BROOKLYN, MI - JULY 4: Gordon Johncock (#5), eventual race winner Gary Gettenhause (#19), Al Unser, Sr. (#2), and Johnny Rutherford (#18) in turn three during the USAC Champ Car race as part of the unusual Twin Bill for stock and open wheel racers on July 4, 1970 at Michigan International Raceway in Brooklyn, Michigan. (Photo by Alvis Upitis)