When Alice and Frank drive into Florence Farms, out of the window opposite Alice a building and then a crane can be seen. As the truck is driving further, it then passes the same building and crane.
VHS wasn't released commercially until 1976, yet there is a Polaroid VHS on the counter in 1973.
When Alice comes out of the bedroom on the first morning of her freedom, the modern clothes she is wearing just happen to fit her.