I'm a huge fan of 1970s cinema. To me the last great decade for motion pictures. I also like a bunch of actors from that decade, including Stacey Keach and Mr. Jones. Keach appeared in a bunch of really interesting movies in the 70s which are all, in my opinion, worth tracking down. The Travelling Executioner, Fat City (directed by John Huston), The Life and Times of Judge Roy Bean (I know you've seen that), he was in a film based on the Jim Thompson novel The Killer Inside Me, Altman's Brewster McCloud, and he topped off the decade as the lead in The Ninth Configuration, a favorite of mine since the early 1980s. He's in a bunch of other interesting stuff too, the guy had a great decade in the 1970s. 

End of the Road is an odd film but it has Keach and Jones, and Terry Southern writing the script based on a John Barth novel. Keach's character suddenly goes catatonic while at a railroad station and then is taken to Jones as his doctor specializes in dealing with this. Once out of the hospital he goes and takes a job where he meets a character played by Harris Yulin (another interesting 1970s character actor of the type we seem to have a shortage of these days) and begins an affair with his wife. 

If you lived closer I would say come over and we could have a movie night and watch it. Not sure my taste in movies is for everyone, but for some reason, I think you would dig it.