If Klitschko fights his best, and any heavy from 70's does his best same night, Foreman catching him early is one with best chance. Shavers had weak chin, and lost almost every time he stepped up. Lyle was too slow. Quarry on his good nights has best chance, Norton on good night good chance. Most likley, Klit is champ though. Vitali is beter of two, I'd pick him over anyone from 70's.