outbox?
tyson had great head movement, but you're talking about outboxing a guy who has a foot of reach on you and a great jab.
tyson's best bet to beat a prime lewis would have been to take his life away. move your head, make your way inside, work the body, and then come up to the head.
problem is that lewis clinched so well, and worked well in the clinch. tyson would have to fight from a distance and at an angle where he could keep his hands free. he was one of the best HW ever at doing this. it would be a great, great fight. the styles might favor lewis, again considering that he's half a foot taller and literally has an advantage of a foot in reach, but tyson had knockout power, and a great chin, so he'd be in it until he tired out.
Tyson Fury's height, reach and skill would give him a great chance of outboxing a prime Lewis.
Prime Mike Tyson might have KO'd Lennox, but he would never have outboxed him.