Triple draw: hold them dead?

[Nate.]

Triple draw.

Folded to me on the button and I raise with KQ542. Player who's very loose and somewhat aggressive on the early streets threebets in the SB. Big blind, a decent-playing regular, fourbets. I call, SB calls.

SB draws 3, BB draws 2, I draw 2. I improve to 7542 (and catch another 4). SB checks, BB bets, I raise, SB calls, BB three-bets, I call, SB calls.

SB draws 2, BB draws 1, I draw 1 and catch an 8 for 87432. Checked to me. Bet for value or check and try to hold them dead? I am confident that BB was drawing to a wheel before the second draw. SB has shown the ability to stand pat with things like rough jacks when he thinks multiple opponents are drawing.

--Nate