Cooney had more one punch power than Frazier (who was a slow starter), & what evidence do we have that Frazier's chin is any better than Nortons?
Cooney blew. He'd get KO'd for sure. The only decent guys he beat were shot. He could hit. No doubt. But he was no Foreman. He'd get beat up badly by a prime Frazier.
Cooney hit like a monster but other than that he had no discernable world-class skills. He also lacked toughness and durability. There is no way he beats Frazier