Carl and Deborah Neville are played by real life husband and wife Robyn Lively and Bart Johnson, the latter of whom is the brother of one of the film's producers, Brad Johnson.
Hawkes car is actually a 73-74 Nova, Not a 68-72. The front end was converted for a more well known style.
At the very end: "In memory of James Carl Kelly who loved movies and muscle cars..."
8 minutes into the director's commentary, Eshom Nelms and Ian Nelms talk about "car porn", how beautiful and powerful the Nova was, and that it was a real quarter track car.
John Hawkes and Robert Forster also worked together in the film Too Late (2015).