Perhaps I'm in the minority but it seems to me Lewis won about 9 rounds in the first fight and about 7 rounds in the second fight, for a combined total of 16/24 rounds. That's hardly a good example of how Ali would win, given that it was a fairly dominating couple of fights by Lewis.
Ali is a bad matchup for Lennox. I'd like Lewis against the likes of Foreman and Frazier etc on styles but Ali would never give Lennox a target while all the while peppering him. I think he'd take a clear decision. I'd honestly be more interested in seeing how Ali handles Wlad.