I say a simultaneous KO 1 as they both land right hands at the same time and crumple to the canvas in unison for 10-counts.
Granite cancels out granite, like when both people throw down a closed fist playing rock/paper/scissors. In this case, it leaves glass.
George actually went to TBE body pretty good and was just as tough as Oliver. I think George would put too much pressure on Oliver and win a close decision.
McCall is winning on points then finally realizes he cant dent Chuvalos chin and starts crying forcing a stoppage, Chuvalo wins.
If you wanna say mentally "tougher", have at it. Physically? Ain't no way on Earth Chuvalo was tougher than Oliver. Original question: I could see Mccall stopping Chuvalo on his feet.
Many in Dec 1969 favored Jerry Quarry to defeat George Chuvalo quite handily, even Jerry believed his press clippings judging on his previous bouts leading up to the Chuvalo bout, it was said that George was washed up, his best days were behind him. However, the bout proved that Chuvalo still had it, his gas tank was not empty. Despite a badly lacerated right eye, George stopped Jerry in round 7. While Oliver McCall has quite a punch, he stopped undefeated champion Lennox Lewis on Sept 24 1994 in round 2 in Wembley Stadium, a title bout in which Lewis was heavily favored to win and retain his title. Chuvalo was a pressure fighter, he could take a punch having never been knocked off of his feet in his career, fighting the likes of Muhammad Ali, twice, Joe Frazier, Jerry Quarry, Floyd Patterson, Ernie Terrell and George Foreman. Mc Call had a huge wallop, he could sure hit. But in my opinion, Chuvalo could withstand the early onslaught by Oliver, and would go on to decision McCall on points.