Hi, My name is Joe Shelfo Sr. As I looked at Allen La Porte's post on his engine build, I noticed that you and I are building similar engines. My son and I are boat racers (drag hydro). I am also doing a 665 with hemi heads. My heads are the older AR-441. They were originally done by Kaase years ago for nitrous application. They have many war wounds, Lots of weld repairs and modifications. I have run these heads before on a 600 inch engine and they ran very strong, with out any water leaks. I just hate putting old heads on a new short block. I have talked to Carrol Carter about his heads. Just undecided at this time. Any way, how do you like his rocker arm set-up? I have never seen his rockers. What do you think about them? Thanks Joe