Nigel Benn vs Julian Jackson at 160

Benn's chin wasn't made of concrete either by the way...but I'd still opt for him to win in a classic slugfest.
Jackson wasn't the best boxer or quickest thinker, but man, what power!
He'd be dangerous on the way down.
Still, Benn is bigger, meaner and could box when he had to. I think he stops Jackson in the middle rounds.

 

Jackson was a huge puncher, however, he was being schooled by Herol Graham for most of the fight before he connected with the big one. Graham had limited power, Benn would hit Jackson with punches he'd only had nightmares about.