100 nl should i slowplay this set.

[jj12]

Villain is unknown

I am dealt KK on the button

Preflop:
I raise to $3.5. Villain calls from the SB.
*** FLOP *** [Kh 6s 8c] $7 in the pot
Villain bets $4. Hero ??

Board seems pretty dry and I think it is very likely he has a pair of 8s or something. There are 2 open ended str8 draws. Even if he hits a str8 I have a good redraw and if he has a pair he has 5 outs to get stacked. If I raise here it seems unlikely that he will call me.