Some of the dresses worn by Julianne Moore in the film actually belonged to Evelyn Ryan. Her children had saved them and offered the use of them for the film.
On two different occasions, the characters talk about the radiator in the Ryan family car. They pronounce it with an A sound as in "hat". People in Northwest Ohio and Northeast Indiana do not say rAd-iator. That is largely a Philadelphia / South Jersey pronunciation.
At one point, the characters watch an actual clip from an actual Miss America pageant in which emcee Bert Parks asks a contestant about that year's presidential election. But shortly afterward, a sequence is identified as occurring in May 1960. Because the Miss America contest was always held (at that time) in September, this clip would have to be been from an earlier pageant (probably 1959) - which was not an election year.