Stud tourney noob question

[chopchoi]

7 stud hi tourney, stakes $200/400. 50 players left, 30 places pay. I have 1800 chips.

I'm the button with K7 in the hole, and a K showing. There's 1 limper who is showing an ace. I raise, bring-in folds, Ace calls.

I've played pot-limit 5 card draw with Ace before, and I know that he is very aggressive with good, but not great hands (raised the pot after the draw with Aces up, then called my pot-sized re-raise). He would also call a small raise with a hand like AQJ72, and draw 2. He will occasionally bluff, but he usually has a hand when he bets.

On 4th street I catch a 9 and he catches an 8. He check-raises me. I call.

5th street doesn't seem to help either of us, and he leads out. I would fold this without a thought in a cash game, unless I knew the player to be super aggressive. But here, I'm terribly short stacked; the antes and bring-ins are becomming downright painful. I'm not sure if I can afford to wait for a better spot.

2 questinons:

1) should I muck, or call down, hoping to catch a card and/or pick off a bluff?

2) From what I've written, what are the chances he has an ace in the hole? I would guess 85%. Am I giving him too much credit, or not enough?

[cgrohman]

What are the antes? If you are going to fold on 5th, you might as well fold to the check raise on 4th. Unless this player has been exceptionally tricky, I would just stick my money in here and hope for the best.