limit newbie, easy value raise?

probably the simplest of hands posted in a while, but i'm clueless when it comes to limit. should i raise/fold here? or just call?

Everest Poker
Limit Holdem Ring game
Limit: $0.25./$0.5
6 players

Pre-flop: (6 players) Hero is UTG+1 with kd ac
UTG calls, Hero raises, 3 folds, BB calls, UTG calls.

Flop: 6s 7c 7d (6.6SB, 3 players)
BB checks, UTG checks, Hero bets, BB calls, UTG calls.

Turn: jd (4.8BB, 3 players)
BB checks, UTG checks, Hero checks.

River: kc (4.8BB, 3 players)
BB bets, UTG calls, Hero ?.

Results:
Final pot: 7.8BB

Methinks you're winning here, so raise.
No way am I folding.

If i was villian(s) and had a 7 or a set, I'd try to build the pot at every opportunity, so BB and UTG's checks spell weakness. I say this because it's very difficult to give opponents bad pot odds in limit poker, so you tend to get a lot of callers.

There are many better limit players on this site than I, so feel free to ignore this advice.

I raise and (reluctantly) call a rare 3-bet. Well played hand. Half the time, I bet this turn too, as it's not at all unlikely that we're still ahead with AK, but using the position to get a free card is of course not bad.

F Paulsson said:

I raise and (reluctantly) call a rare 3-bet. Well played hand. Half the time, I bet this turn too, as it's not at all unlikely that we're still ahead with AK, but using the position to get a free card is of course not bad.

Click to expand...

I'm with FP here - I think you have to raise, and even call a 3-bet. If your opponent is an experienced limit player, he will know there's no point in slowplaying trips in a limit game. At worst, he should have bet on the turn if he had the sevens. Waiting to the river lowers his winnings, so I would discount him having the 7.
It's possible he has a better 2 pair than you (KJ), but not likely. KJ would bet on the turn (TP, good kicker), so we have to discount this one too.

Much more likely is that he has KQ, KT or really any Kx suited, and is taking a shot at the pot.