In the early 1960s, Hoover began flying a North American P-51 Mustang at air shows around the country. The Hoover Mustang (registration "N2251D") was purchased by North American Aviation from Dave Lindsay's Cavalier Aircraft Corp. in 1962. A second Mustang ("N51RH"), later named "Ole Yeller", was purchased by North American Rockwell from Cavalier in 1971 to replace the earlier aircraft, which had been destroyed in a ground accident when an oxygen bottle exploded after being overfilled. Hoover demonstrated the Mustang and later an Aero Commander at hundreds of air shows until his retirement in the 1990s. In 1997, Hoover sold "Ole Yeller" to his good friend John Bagley of Rexburg, Idaho. "Ole Yeller" still flies frequently and is based at the Legacy Flight Museum in Rexburg.