Revealing mistake: During the race through the desert in Annie's Jeep, the rear-screen projection couldn't be more obvious. In the supposedly speeding vehicle, Annie's hair is blowing slightly, but Kimble's never moves at all. (00:35:30)
Revealing mistake: Within hours of being shot in the leg and having the bullet dug out without anesthetic (unless a slug of whiskey counts), Kimble is not even limping. (00:15:00)
Answer: Production vehicle models aren't in sync with the calendar year. The '65 Mustang began production in March 1964 and first sold in April 1964, before it was "introduced" the following year. I don't know which model was seen in the episode, but the 2+2 fastback was sold in September 1964. The 1964 film "Goldfinger" uses a 1965 Mustang as part of Ford's product placement. Basically, in the 1930's, FDR ordered automakers to release vehicles in the fall of the preceding calendar year "as a means of facilitating regularization of employment in the industry." Now, automakers can release new models as early as Jan 2 of the preceding year.
Bishop73