I wouldn't even put him on KJ. I'd think if he was just a little loose, I would think that with AKs or even AKo he'd be happy just getting in 3 bets before the flop. If he has AK he's waiting to hit and pick up a flush draw if he gets lucky. I'd put him on an AK and he thinks that nobody can beat his kicker. I'd think he has K's and 5's with the A after the turn.