Maniacs give great implied odds, so in this situation, JTo isnt that bad really.

You likely want to cap the flop with your pair + strong draw. After that, evaluate each street as it comes in. Getting 1 (or 3, heh) bets in each one depending on if you improve and how absolutely crazy this guy can go with air (ie ace-rag high), an oesd, a loww pp, or random-trash.