In 1961, Mantz merged his flight operations with Frank Tallman’s business, Tallman Aviation, retaining the Orange County base of his own aviation business, Paul Mantz Air Services, and incorporating Tallman's extensive aviation collection. Tallman, sixteen years his junior, took a lead role, becoming president of the new corporation. Mantz was in an unannounced semi-retirement but continued to contribute to various Tallmantz projects.

Frank Tallman was a stunt pilot who worked in Hollywood during the 1960s and 1970s. An avid lover of early bird flyers, Tallman amassed a collection of rare and vintage airplanes with a significant collection of pre-1920s aircraft. By 1959 he had moved he and his collection of around 16 flyable antique aircraft to southern California where he based his business, Tallman Aviation, and was ready to take on movie productions.

Not far from Tallman, Paul Mantz was an established Hollywood stunt pilot, and took the majority of work within Hollywood productions. Mantz was looking to go into business with a partner, and while he was the undisputed Hollywood Pilot, Tallman also received his fair share of film work, so it would eliminated his competition if they were to work together. The two men went on to film an impressive number of productions including titles such as “How the West was Won”, “Hogan’s Heroes”, “It’s a Mad Mad Mad Mad World”, “Gathering of Eagles”, “Catch-22”, “Air Mail”, and many others.

After Frank Tallman injured his left leg in a go-kart accident in May 1965, Mantz stepped in to fly the Tallmantz-constructed aircraft for the film Flight of the Phoenix. As detailed elsewhere, the airplane performed marginally at best, and Mantz was killed in front of the cameras on July 8, 1965, during a simulated takeoff from the desert floor near Yuma, Arizona. Meanwhile, Tallman’s leg suffered when severe complications set in during the healing. At the same time Mantz was in Yuma trying to fly the “Phoenix,” Tallman was offered a choice by his doctors: have his leg amputated above the knee or have it heal stiff and unusable. Both options rendered his future as a pilot in question, but he chose to have his leg amputated as he decided that option offered him the best possibility of returning to the cockpit and his livelihood.

The company was set back momentarily, but Tallman was able to pull it out of lawsuits and other complications, and lead Tallmanz Aviation forward. The company was involved in the production of a number of movies and made a strong name in Hollywood. However, the continued success of Tallmantz Aviation stopped abruptly when, in 1978 while Tallman was flying a company Piper Aztec, he was mislead while trying to find his way through thick clouds and hard mountains and flew directly into a mountain ridgeline located fifteen miles northeast of Orange County Airport.