Just a heads up: Cybil Sheppard is spelled Cybill Shepherd.
The Last Picture Show is a very good movie. I hated the book though; it's just an endless series of people hooking up. I never actually finished it as a matter of fact. I stopped at the bestiality scene. It's funny, that a short story about Dark Gods and snake people isn't nearly as screwed up as a book about a bunch of teenagers who hang out and occasionally rape livestock.
RIP Cloris Leechman