I feel I suck for not knowing what to do here. 100bb effective stacks

Anyway, the villian has been playing uber snug 17/9/2 over a bit more than 150 hands

I have been playing aggressive at the table (27/23), so my image is at best so-so.

I open UTG to 3.5 with [Kh], folded to the villian in the BB who calls,

Flop is [Jh][9h] ~7.50

Villain leads for full pot, hero does what here?

I don't think he almost ever lead/folds there, so I'd rule out raising.

I actually think JJ and 99 are in his range here, as I would not 3-bet you preflop with those hands and I am significantly more aggressive than this guy, especially if you've been running 27/23. I also think it's going to be impossible to get money in when you're ahead and you'll occasionally be behind even if a or turns, so I'd probably fold to a pot size bet but I would call if he bet a bit less.

call/minraise turn (if we miss)

I cant imagine folding this. Since the guy is a nit, I would call and see what developes. Against most people though, I would be raising.

Actually, alot of nits are also weak tight so if I sense any weak tightness in his game, Im raising. I can easily see him with [Qd] here and a W/T is folding that to a raise.