In the opening scene, it says it's 1956, but the hit men drove up in a Cadillac from the 1970's.
When Billy is playing football with his friends and brother, Billy wears a blue baseball cap in some shots, and his friend wears the same cap in other shots.
Before the getaway car drives into the U-Haul in the port, in the background of one scene, there are 2 covered grain hopper car with somewhat cylindrical bodies (the ones with COTTON BELT on their sides). The story is set in 1956. the design of these cars was from the early 60s.
The production company name in the opening credits has a typo: Ranson, for Ransom.
Set in 1956, yet 1970s vehicles are visible throughout the film.
One boy wears an LA Dodgers baseball cap. In 1956, they were the Brooklyn Dodgers; they moved to Los Angeles in 1958.
Early in the film, when white politicians and police are discussing Pasha's numbers racket, a microphone dips into the top of the shot.