Factual error: During one of the scenes, you see a guy on a motorcycle wearing a Misfits jacket. The movie takes place in '76, but the Misfits didn't form until '77.
Factual error: When they are initiating the freshman girls after school in the parking lot you can see a red mid-70s Firebird with red camaro z/28 wheels that did not come out until the mid 80's. The film is set on the last day of school 1976.
Factual error: As the girls are being hazed, the girl giving the orders is shown from the front and in the distance behind her are a red and white mid-1980s Chevy S10 Blazer, a white '90s VW Jetta, tho the events of the film occur in 1976. There's also a Pier One billboard in the background. Pier One wasn't incorporated until 1986. (00:20:30)
Factual error: During a classroom scene on the last day of school one of the students has a KISS "Rock and Roll Over" shirt on. That KISS album did not come out until Nov. 76, the movie takes place in the spring of 76.
Factual error: When Cynthia, Mike and Tony are driving to the Top Notch, there is a very clear shot of a billboard alongside the road. It advertises PCA, an HMO for employees of the State of Texas which only existed from the mid-1980's until 1992. (The film, of course, is set in 1976.)
Factual error: The Coke sign in the background when Donny goes to steal the beer and Mitch is the lookout was introduced in 1987.
Factual error: Benny's Black Chevrolet truck has a 90's-era GM factory steering wheel, probably from a later restoration.