Most of the older films are disappointing as hell to me, even some from the 30s and 40s are piss poor.
I love to read about the old fights and then see the film. It's been my experience to wonder if some of the writers even saw the fight. They either exaggerate or don't do the fight justice. Most are very accurate though.
Good luck finding a usable copy, I'm interested in you opinion of the writing compared to the fight.