I saw a “where it it now” type of TV show a few years back and it showed the first mustang off the assembly line. A traveling salesman had bought it. Ford tracked it down and was surprised it was still around. They bought it, restored it and put it in the Henry Ford Museum.
There was a famous pancake house in Detroit. Lee Iacoca said he knew he had a hit when he drove by one day and there was a sign in the window that said “Our hotcakes are selling like Mustangs”.