I caught Dr. Strangelove the other day. Sorry, not a single car in the movie but one of my all time fave flicks. Peter Sellers as the title character is great but Slim Pickens straight up steals the movie.

I really wish I could find the documentary short about the building of the cars for Christine. I saw it back in the late 80s and have spent a lot of time hunting for it. Watched this the other day and I'd recommend it:

https://www.youtube.com/watch?v=usfahgUOTZ0