When the Sheriff gets into the Jeep, it is a CJ-7. CJ-7 didn't come out until 1976.
The episode "Freedom" is set in Nevada. At one point, the sheriff radios the station and tells his deputy to inform another department to set up a road block on Interstate 70. I-70's western terminus is in Utah, not Nevada.
When grandfather is showing the diagram of the grasshopper and the door to his grandson (Sam), he explains, "the grasshopper goes through the door and beyond it is another life"). Sam asks, "what if there's nothing beyond the door?" indicating that he isn't sure about life after death, yet Sam has shown a belief in God numerous times. In Genesis and the Leap Home, he prayed, and he has said numerous time, "God, or fate or whatever is leaping me around".