At 1:30, as John-Boy is walking up the driveway, a couple of 1970s-era vehicles can be seen parked on the dirt road on the far right-hand side of the screen.
At 42:20, after quoting a passage from George Eliot's "Middlemarch," John-Boy refers to the author as a "he." George Eliot was the pen name of Marian Evans, who revealed her true identity in 1859, so by the 1930s it was well known that Eliot was female. As an aspiring writer and voracious reader, John-Boy likely would have known this.