I have Dan at performance Only doing my 588" blown Stage V Hemi. He was willing to work with me on my time line and has been very helpful so far. I bought the heads and will be getting the Stage V rocker assembly from FHO, who have also been very helpful but unfortunately the build cost was a little too much for me. I have also had helpful advise from Bob George. I would like to add that Dan has also given me a lot of his time on the phone discussing the build so my hard earned money is in his hands.