Big draw OOP vs maniac

[schlucky1]

I had this situation come up twice tonight against the same player. Player was a total maniac 62/46/3 in over 400 hands. He always bet pot after his pf raises, and would 3-barrell if he didn't encounter resistance. Anyway, here's the situation:

NL $.5/1 Hero and villain both have at least a full buy-in

Hero dealt K [img]/images/graemlins/heart.gif[/img]Q [img]/images/graemlins/heart.gif[/img] in BB

Villian raises to $3.5 in CO, Hero calls $2.5

Flop: A [img]/images/graemlins/heart.gif[/img]8 [img]/images/graemlins/spade.gif[/img]J [img]/images/graemlins/heart.gif[/img]

Hero?

Against a normal opponent I would check-raise the flop. One thing that makes this tricky is that he is calling my C/R like 45% of the time, shoving 45%, and folding the rest. This means I have very little fold equity and may be left guessing on the turn if I don't hit.

This guy is willing to get it in w/any type of pair or draw, so I'm ahead of his range most of the time. He's so crazy though, that I'm not sure if there is a better line or not.