I don't see how you could ever come to the conclusion of Chuvalo winning unless you think Tyson is going to wear out....
Tyson by TKO in round 5-6. I think George would remain on his feet the entire fight, but he would be eating some serious leather. The ref would stop it with Tyson unleashing powerful combos on George against the ropes.
Pretty decent chance of the ref or corner stopping it in the mid to late rounds with George absorbing punishment or covering up against an onslaught ala the Foreman-Chuvalo fight. Otherwise Tyson wins a decision.
I love Chuvalo, and I admit to hate Tyson, BUT Tyson stops Chuvalo something like the Joe Frazier - George Chuvalo RSC4 comes to mind. Woller