I think a prime Folley against the '51 Louis was have a pretty good chance. Not a lock mind you, but a pretty good chance. The reflexes on the right side of Joe's body were almost non-existent for offensive purposes by then as I recall. Any version of the 1936 to '48 Louis beats Zora. Just to spice up Folley's case a bit, I will suggest that he was a better fighter than any of the men Louis fought between the Charles fight and the Marciano fight.