george chuvalo vs rocky marciano
chuvalo 6´0 217 pounds
marciano 5´11 187 pounds
chuvalo was stronger, he had better chin, he was much heavier and naturally bigger, he had 73(64ko),good hitting power. chuvalo was not more slow than rocky, and he had great heart.
marciano was harder puncher, he had more stamina and maybe more heart, (but it is close).
i think that this fight would be much more competitive than many people think.