I haven't slept for about 30 hours having played live and online in recent days, but looking over that HH, let me get this straight, you have the str8t on a paired board? And against someone who has shown a strong tendency to check very nuttish hands on the river? What was your read of him at the time in that hand apart from the general impression that he wasn't a good player? In other words was there anything that impressed you during that hand about him that told you he had changed his MO for some reason.
As you describe it my play on the river would be to overbet raise the river, yes you don't have the nuts here but from how you describe him he doesn't either and your hand has a lot of hands that he thinks are the goods smashed - lesser str8ts, even 3 pair (lol) type of hands he thinks are awesome, or a pair up with TK etc. For the good players in a tourney there is a scramble over the chips of the lesser players and I don't think you can really pass this spot up to get a leg up on the segment of the field that will be around at the latter stages of the tourney. I think he calls with the hands that you have dominated to an overbet. If he 3 bets you you are in a disgusting spot, and I don't even want to think about what I would do there given I wasn't there in the situation you describe. But yeah as you describe I would overbet raise the river, and expect to just get flat called with just about all of his flop continuation range, including the stone cold nuts.
Having said all that I have played so many hands vs these types of players online given I play micro/low cash (having said that, this exact level of incompetence is rare online), and there is nothing that would surprise me, short of said player snap calling, turning over two jokers and then physically morphing into the giant puppett thing from the 70's TV show HR Puff'nstuff, then giving you a dead eye stare across the felt as it drags in your chips to its stack, cackling to you in Heath Ledger's voice: "Why so serious?"
As you describe it my play on the river would be to overbet raise the river, yes you don't have the nuts here but from how you describe him he doesn't either and your hand has a lot of hands that he thinks are the goods smashed - lesser str8ts, even 3 pair (lol) type of hands he thinks are awesome, or a pair up with TK etc. For the good players in a tourney there is a scramble over the chips of the lesser players and I don't think you can really pass this spot up to get a leg up on the segment of the field that will be around at the latter stages of the tourney. I think he calls with the hands that you have dominated to an overbet. If he 3 bets you you are in a disgusting spot, and I don't even want to think about what I would do there given I wasn't there in the situation you describe. But yeah as you describe I would overbet raise the river, and expect to just get flat called with just about all of his flop continuation range, including the stone cold nuts.
Having said all that I have played so many hands vs these types of players online given I play micro/low cash (having said that, this exact level of incompetence is rare online), and there is nothing that would surprise me, short of said player snap calling, turning over two jokers and then physically morphing into the giant puppett thing from the 70's TV show HR Puff'nstuff, then giving you a dead eye stare across the felt as it drags in your chips to its stack, cackling to you in Heath Ledger's voice: "Why so serious?"