When Swede and teen Merry talk in her bedroom, the LP cover at the front of a stack of records on the floor changes.
The Newark riots of July 1967 are shown to happen after a speech that President Johnson gave in September of 1967.
Near the beginning of the film Levov Sr. makes the statement that his son's party is taking place in Republican territory--that it's where the KKK lives. The KKK, being nearly 100% made up of poor Whites then and now, have been Democratic until Regan pulled them all into the Republican Party to make room for the then-emerging Marxists who had subtly taken the Democratic Party for themselves, beginning during the 1960s. So, what Levov should have said was Democratic, not Republican.
A 1947 newspaper article shows the surname of Newark's mayor as Cole. The surname of Newark's mayor in 1947 was Murphy.
The newspaper's masthead identifies 1970 as it's "141th Year." Should have been "141st Year."
Army National Guardsman - The young army guardsman they have a short talk with outside of the factory in NJ/NYC is actually wearing a 25th infantry patch.
At the start of the film when they show the Miss USA pageant contestants lined up in the still photo, it shows Miss N.J, Miss California and Miss Canada, Canada is not a State, or American.
But a few contestants represent a city rather than a state (Memphis, Miami, Pittsburgh), so Miss Canada could be from Kansas or Kentucky.
Actually 1947 the Miss Canada Pageant began sending delegates.