Sales skyrocketed throughout the '60s, and by 1967, Ford even introduced a four-door model. But in 1972, the Thunderbird returned to its two-door roots - only now, it was a different beast ...

Ford hoped the Thunderbird would remind people of the roadsters from before WWII and thus considered it an "image car" that might sell 10,000 units a year. So, when they sold 16,155 in 1955, Ford ...