Stars $20+2, overpair on a dangerous board OOP

[BIG NIGE]

PokerStars No-Limit Hold'em Tourney, Big Blind is t20 (9 handed) Hand History Converter Tool from FlopTurnRiver.com (Format: 2+2 Forums)

MP3 (t1500)
CO (t1100)
Button (t1470)
SB (t1530)
Hero (t1500)
UTG (t1500)
UTG+1 (t1500)
MP1 (t1100)
MP2 (t2300)

Preflop: Hero is BB with 8[img]/images/graemlins/heart.gif[/img], 8[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">3 folds</font>, MP2 calls t20, <font color="#666666">1 fold</font>, CO calls t20, <font color="#666666">1 fold</font>, SB completes, Hero checks.

Flop: (t80) 4[img]/images/graemlins/club.gif[/img], 5[img]/images/graemlins/club.gif[/img], 7[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(4 players)</font>
SB checks, <font color="#CC3333">Hero bets t80</font>, MP2 calls t80, CO calls t80, SB folds.

Turn: (t320) 5[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">Hero bets t320</font>, MP2 calls t320, CO folds.

River: (t960) A[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, MP2 checks.

Final Pot: t960

Results in white below: <font color="#FFFFFF">
Hero has 8h 8d (two pair, eights and fives).
MP2 has 5s 6h (three of a kind, fives).
Outcome: MP2 wins t960. </font>

I was thinking of raising preflop to 80, but that could force me to play a big pot in a pot where I don't know if I'm good. If he had pushed on the river I probably would have called because a hand or two eqarlier he made a big bet on the turn in a multiway pot and then a big bet on the river against two people, and insinuated afterward that he was bluffing.

[AMT]

if youre going to lead at a multi way flop like this after taking 88 for set value you have to set a limit on the pot size with your marginal hand; basically you shouldnt be willing to play a huge pot with your hand after getting called in two places, im trying to just show down after the flop. im checking turn.

[ymu]

I quite like this line in a limped pot - there's not many likely overpairs out, A4-A7/66 are probably calling, as are a lot of flush/straight/combo draws.

I'd bet less on the turn - maybe 220ish. I think he's more likely/drawing or behind and I'd prefer to keep him guessing about my hand than have to start guessing about his. If he comes over the top, easy fold - if he calls, there's a decision to be made if he bets the river.

[raise_happy]

i would bet the flop and if i miss on the turn then i would try to get a cheap showdown and fold to any sign of strength.