Id go with Rob at RB Racing of MI. His name on here is MACHWON, i dont have his number on hand but can get it later.
I have his work, and my bike runs great, im super happy with it. Not to mention the turn around is 2 weeks, and costs $175 for an aggresive dune port which is what I have.
You cant go wrong with him, im sure others will chime in and agree.....