Frazier via UD. This would be an awesome fight, Ike would of overwhelmed him early via his insane workrate and likely drop Frazier once, but around round 5, 6 Frazier would start heating up and the punishment would get worse every round for Ibeabuchi. He wins a UD 7-5, 8-4 and it would be much worse if it was 15...
Frazier's worst match ups are vs durable, bigger punchers. That description fits Ike to a T. Ike not only went toe to toe with Tua, he tracked down a hard to catch Byrd and nailed him with a HUGE hook. I think Ike would win even though Frazier is a much more accomplished fighter.