I noticed the mistake as well on the Mustang. Another way to tell is the center of the tail lights on the 64 & 65 are not inverted in, like the 67 or 68. My dad had a 68 that he bought new. It was totaled in a head on accident in 69. Up to the day he passed away in 2004 this was his favorite car. I wish they got the car right in the movie 68 not 64 - 65.