Check-raise this turn with a big draw?

[Stealthy]

Vilain is 42/18/1.3 after 350 hands and we have done battle a few times with me having much the better of it.

Party Poker 3/6 Hold'em (6 max, 6 handed) converter

Preflop: Hero is SB with Q[img]/images/graemlins/diamond.gif[/img], K[img]/images/graemlins/diamond.gif[/img].
<font color="#666666">4 folds</font>, <font color="#CC3333">Hero raises</font>, <font color="#CC3333">BB 3-bets</font>, <font color="#CC3333">Hero caps</font>, BB calls.

Flop: (8 SB) 7[img]/images/graemlins/diamond.gif[/img], J[img]/images/graemlins/heart.gif[/img], 3[img]/images/graemlins/club.gif[/img] <font color="#0000FF">(2 players)</font>
<font color="#CC3333">Hero bets</font>, <font color="#CC3333">BB raises</font>, Hero calls.

Turn: (6 BB) T[img]/images/graemlins/diamond.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, Hero calls.

River: (8 BB) A[img]/images/graemlins/heart.gif[/img] <font color="#0000FF">(2 players)</font>
Hero checks, <font color="#CC3333">BB bets</font>, <font color="#CC3333">Hero raises</font>,

It is the turn I am asking about as to whether I can check-raise here or is it better to just play the draw softly given the early action?

Also was I OK to check-raise the river when my hand got there or should I always lead here? I was fairly sure he would fire but the Ace is always a scare card which does freeze players up.