I watched this in preparation for the Cohen Brothers’ remake and I have to say I enjoyed it. It was a bit slow, in that pre-Mtv movie way, but was amusing. Kim Darby was right on the age of incredibly annoying and incredibly funny and it was fun to see Glen Campbell, Robert Duvall and a very young Dennis Hopper.
http://www.impawards.com/1969/true_grit.html
My favorite John Wayne movie is the Quiet Man. Somehow that transcends all of his other western roles in my mind. We watched all of these movie with my grandparents. I don't recall this one specifically.