Although set in 1982, the beer cans that they are drinking from- most noticeably in the backyard after the block party- JJ is drinking a Budweiser with a push tab opener. These weren't introduced to beer cans until 1990. They should have pull tab openers.
At 1:10:59 and 1:12:51, Winky doesn't have a coin to put in the payphone.
Movie is set in the early 80s, but Frankie's Cadillac has a modern CD player.