At 01:38:52, there is a party scene and the time-line is 1963. Everyone is dancing to "Shotgun" by Jr. Walker & the All Stars. That single does not get released till two years later in 1965 in the film. Please do your research properly. And Motown isn't the only musical r&b-soul backdrop for the early sixties.
Please note: My star rating is 2 at this time. I haven't completed the film yet. Thank you.