Factual error: In the scene in Bodell's Music Store, there is a copy of Al Martino's Spanish Eyes LP in the rack. It didn't come out until 1966. Also, You Can't Sit Down by the Phil Upchurch Combo was not a hit until June 1961.
Factual error: Charlie's 58 Impala is a sweet ride, but his license plates don't have the requisite year stickers. His car has the '56 series of plates, and each subsequent year would require that current year's sticker.