Even though Lyle rips off the antenna from his car to hit one of the bar thugs, after gambling on a pinball game, as they drive off you can clearly see the antenna is still attached.
Lyle Wheeler steals the Mustang from a gas station while only carrying a bed roll. As the movie progresses it's clear he somehow was able to obtain his gun fight winning pistol and holster as well as several changes in clothing.
Lyle bumps the police car and chrome trim is shown missing from the Mustang's hood but the trim reappears for the remainder of the car's filmed scenes.
When the cops enter Room #9 that they had just shot up after being told by the clerk that it was the room that the gang was in, there are three people shot dead on the bed. The woman nearest the door is covered from the neck to the upper thighs with the bed sheet in the first camera shot, but in the very next one a few seconds later, the sheet only covers her from the waist down, leaving her chest exposed.
As Lyle watches Bobbie Jo admire the guitar the restaurant parking lot behind him changes: The Chevy pickup disappears, a Mercury Cougar appears, and outside diners are sometimes visible while at other times the tables are empty.
Ford never built a 454 C.I. Engine like the man said was in the Mustang.
The mustang is most likely a 429 NOT a 454.
When Lyle and Bobbie Jo are shooting beer cans off of a car, they fire seven shots from the revolver without reloading. As the scene starts, Lyle fires five before handing the gun to her, and she then fires twice.
During car chases, tires are heard squealing on dirt roads. This does not occur outside of the movies.