Inspired by Norton v Spinks bros post. Take the Ali of the Norton 2,Frazier 2 and the Foreman fight against both of the above. I take Ali to ko Leon within 5 rounds. Michael would always be an awkward customer to stylists like Ali and Larry Holmes in the early going,but just as I would back a peak Holmes to stop Michael around the halfway mark, I think this version of Ali would also.
Yeah a tag team bout would be the Spinks bros. only chance. The Ali of Norton II and Frazier II had hand trouble having injured his right in the seventh of the Norton bout and not being able to use it for power punches so it might be that he would have to settle for a points win though I'd say he'd probably could wear them down with one hand. In a way I'd say Leon would stylistically be the harder of the two being a swarmer which often gave Ali some problems. Both Spinks bros. were lucky to encounter two aging champs who at that stage of their caeers would be troubled by the bros. respective styles.
The 1974 Ali who beat Foreman vs any version of Leon Spinks is a no brainer. Muhammad wins that one with ease and probably by a stoppage of some sort. A 1985 Michael Spinks vs a 1974 Ali, might have been a bit more interesting, but I still think Ali wins convincingly enough.
The 1973-74 Ali beats both Spinks brothers easily. Michael would probably lose a one sided decision. Leon would be knocked out.
Alternatively Ali would fight them one at a time on the same night ! I can just hear him. "To prove that I am the greatest,I'm gonna whup both Spinks's on the same night. Leon is just another sucker I'm gonna float like a butterfly and sting like a bee on. I hear Michael's been doing a lot of popping off about a punch called the Spinks jinks. well he ai n't never met a boxer like me who's pretty and thinks"
