Ali would find himself on the canvas against Tyson. He wouldn't stay there but he would have to dig deep like you always did. Make no mistake Ali with his hands down against Tyson's explosive lightning quick hooks is not that easy of a formula for Ali. You're probably right in that Ali would take Tyson into deep water and drown him but it would not be pretty all the way through.
And I joke but (from early impressions and what I can gather) Liston was at least 34 on that fight, or 38/40. I think he was born in 1924 just coz it was the first theory I read on it but if it's right I don't think it's that bad