J Heads

Rumblefish, I'm gonna be putting either 3.91s or 4.10s in it hopefully, unless I should go with different ones, if anyone has suggestions on that. I'm taking the block to the machine shop tomorrow, and I still have to go pick up the other J head cuz accidently got a 318 one with it, but the guy found the other one. So maybe I'll ask the machinist the cost to do them up real good and whatnot. Well, at least this is the first step and hopefully I could figure everything out, and I appreciate all the help/info I'm getting.