It's a somewhat known fact that Mel's original ideas for Blazing Saddles were to have Richard Pryor play Bart and have John Wayne play the Waco Kid. But Pryor was way into his drug addiction at this point, and Wayne, though he LOVED the script, was worried about how it would affect his "family-friendly" image. But let's say Pryor was able to clean up earlier, and Wayne figured it was time in his career to try something different. How would it have worked out? While I can see Pryor as Bart working well, I cant see Wayne pulling off the Waco Kid as well as Gene Wilder did.