Pre exile Ali wins with ease. Post exile Ali, a slight underdog IMHO. Lennox can catch and nail that version, and he is too big, and hits too hard for the Greatest. A completely drunk and / or stoned Lewis could not possibly look as useless or stupid as Foreman did in Ziare.
Lewis wouldn't be able to outbox Ali, wouldn't be able to stop Ali. Lewis could never replicate a Frazier or Norton type pressure fight. I think he'd be eating Ali's jab all night attempting to set up some offense.
I think the fight would be similar to Lewis - Bruno, except Ali being Bruno and he would win. Ali wouldn't be dazed or mentally affected by Lewis' hail mary punch. He would just outbox Lewis and win a clear decision. Contrary to popular belief, Frank Bruno had a hell of a chin but mentally he was fragile. Ali was stronger mentally and had an even better chin than Frank Bruno. Ali could knock Lewis out but it's unlikely, most likely outcome is Ali UD. Lewis could not knock Ali out or outbox him. EDIT: Correction; Ali MAY be dazed by a Lewis bomb but he would never let it affect him mentally.
Post exile Ali simply couldn't dance his way to victory. His clinching tactic would be suicidal against Lennox as not only would he outweighed by 20+pounds Lewis is by far and away stronger than any man Ali ever fought.
Lennox would walk him diwn and stop him late, probably 11th round no way clay could deal with that power
