The western Oklahoma town, Weatherford, is misspelled as "Wetherford", on a marquee.
In the shot of downtown Oklahoma City, the skyline features the Ford Center, not built until the early 2000s.
Girls did not play full-court basketball at that time in history: girls' basketball in Oklahoma was a half-court, 3-on-3 game until the mid 1980's.
The hay machine, the Do-Ese, wasn't invented until the next decade.
Three point lines were not painted on the gym floor in the 1960's.
The scoreboard in the gym has the name "Daktronics" on it. This company, based in Brookings, South Dakota, was not in existence during this time period.