Don't know if it's true but I had read 'Slap Shot' was one of his favorites too. I loved that flick... such a departure from his usual rolls. Liked that he drove a (Pontiac) GTO in the picture too.
Get the DVD and there's interviews with the 'brothers'... the guys with glasses, forget the name just now.
I liked Torn Curtain (Hitchcock), 'Sundance, Hud, Coolhand Luke, but a major oversight is not having saw Winning, the movie that introduced him to his great passion outside his wife.
A man of character.