who would win in a legit power lifting contest between these two
I'm too lazy to track down all of Bell's numbers, but it would probably be closer than many think. Bell is a bit worn, but he still squats in the low #600s, deadlifts a bit over #700, and benches in the mid # 500 - #600 range. O'hearn's best powerlifting performance had him with a #650 squat, #705 deadlift, and a #462 bench. That being said, he lifted those numbers around 22 years ago, so he might be better, might be worse.
The bench is the sticky wicket, Bell is legitimately a great bencher.