fold equity ? QJ vs steal

[Bodhi]

Party Poker 2/4 Hold'em (9 handed) converter

Villain is tight-aggressive. Around 19%, 10%, 4af. I have only been playing one table this morning trying to work on my game. I haven't seen him show down yet. Earlier he raised in the SB after a number of limpers, and just check-folded a K-hi flop, so he's not the kind who overplays a hand that missed. Blind defense and offense is one of the weaker points in my game. Thoughts on the river? I don't think I can win by checking-behind; how's my fold equity?

Preflop: Hero is BB with J[img]/images/graemlins/spade.gif[/img], Q[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">7 folds</font>, <font color="#CC3333">SB raises</font>, <font color="#CC3333">Hero 3-bets</font>, SB calls.

Flop: (6 SB) 3[img]/images/graemlins/club.gif[/img], T[img]/images/graemlins/spade.gif[/img], 8[img]/images/graemlins/spade.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">SB bets</font>, <font color="#CC3333">Hero raises</font>, SB calls.

Turn: (5 BB) 3[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>, SB calls.

River: (7 BB) 4[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
SB checks, <font color="#CC3333">Hero bets</font>...

[TripleH68]

-The only pair that makes sense is 8s.
-You are beating most str8 draws.
-Will he fold overcards or ace high getting 8:1? He is likely aware of the pot size and that you are willing to bet a busted draw.

But I like the bet anyway getting 7:1.