What about your rods. I may have missed them if you mentioned them. You'll want to upgrade to some decent rods if you're producing enough power. I'd hate to see you put all this work into it and have your stock rods bend or snap.
Also, I would highly recommend upgrading you IM. Maybe P&P it yourself with some dremel tools. Just go from rough til its smooth. I've seen some guys come to a mirror finish inside the IM like your pistons. Good work though. Keep it up.
Edit: what compression are those pistons going to yield?