$1-2 Live NLHE -tricky river on scary board.

[deankeaton7]

Villain in this hand is pretty tricky/aggressive, but
not crazy. Loose preflop, selectively loose post flop.
Villain raises in early position to $7 (and has about $150
behind). I call on button with 6d 8d (with about 190 behind).
Loose/bad SB calls. Flop comes down Ad Th 5d. SB checks, raiser checks, then as I ponder betting my draw, he says, "uh oh, hes thinking about it." After a few moments, I check as well. Turn is Kd. He leads for $20. Raise, call? I can see merits for both.

Assume you call and SB folds. River is Ts. Raiser checks. We bet $30, he raises $40 more. What is our action? What do we put him on?