Three P-51 Mustangs buzzed Ford’s sprawling factory as the 10-millionth Mustang car rolled off the line, they should have had 10 planes instead. That would have been cooler

Ford Mustang number-10 million is a Wimbledon White GT convertible (not a standard paint color on the configurator) with black interior, echoing Ford Mustang number-one, which was on-loan from The Henry Ford museum.

While the 2019 Mustang GT has a 460-hp 5.0-liter GT, the 1964-1/2 Mustang had a 164-hp 260 cubic-inch 4.3-liter.

 The original was built with a three-speed automatic transmission while the new one was built with a six-speed manual, not the 10-speed automatic.

https://www.automobilemag.com/news/10-millionth-mustang/