Thanks for the interior shots, it's good to know that the owners are generally friendly.
You mentioned that the second car was in one of the Hopalong Cassidy films. I've seen a lot of them (Sad that they don't appear to be part of the western channel anymore). Was the car on the ground in the movie, or was it part of a train? I don't remember seeing any SG shots in the movies, but I may just not have noticed, or seen that one. I do remember seeing what I thought was one of the Ex SPC ten-wheelers in one though.