2/4 87s, flops gutshot

[Vermin]

No read on SB, button is passive.

Party Poker 2/4 Hold'em (9 handed) FTR converter on zerodivide.cx

Preflop: Hero is BB with 7[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img]. MP3 posts a blind of $2.
<font color="#666666">4 folds</font>, MP3 (poster) checks, <font color="#666666">1 fold</font>, Button calls, <font color="#CC3333">SB raises</font>, Hero calls, MP3 folds, Button calls.

Flop: (7 SB) 9[img]/images/graemlins/spade.gif[/img], 5[img]/images/graemlins/diamond.gif[/img], 2[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(3 players)</font>
<font color="#CC3333">SB bets</font>, Hero calls

Is this call ok? I´m only getting 8:1, but I´ve got three outs to the nuts (might be sensitive to re-draws though), one to a probable winner, it´s not unlikely that the pre-raiser is betting overcards so I might win with an 8 or 7. I´ve also got the backdoor flush draw. Since the button is passive I´m not to worried about a raise from him on this board.