Built by North American Aviation as an AT-6 in the 1940s, the airframe that would become “Undecided,” Race Number 90, was remanufactured in 1953 as a T-6G and served the United States Air Force. The airplane debuted at Reno as Undecided, Race #90, in 1990 after years of restoration. In 1991, it took first place in the Silver Race with an average speed of 223.165 miles per hour. It took 1st in Silver again in 1993, 2010, and 2019. In its years at Reno, the aircraft has participated in a total of 12 Gold Races, 12 Silver, and 2 Bronze.