Well my friend's built 4g63 (put down over 700wheel on a mustang dyno) decided to throw a wrist pin and he turned in the towel and is done with dsm's (traitor that he is now).
I ended up getting a hell of a deal out of his disaster.

Fully ported and machined head (intake and exhaust manifolds port matched, 1mm oversized manleys, titanium springs and retainers, full 3 angle job w/ p&p, webcams 264/272 with unorthodox adjustable gears +arp headbolts) for less than $600 assembled. I've known the guy for a very long time, he's very trustworthy. The head was measured and checked for warpage and it's good to go after a slight deck shave. I watched this motor get built from the ground up and the machining was done by the finest machine shop in town.

I have two questions. First, my 16g is currently running @ 20lbs (tuned @ 12.6afr, full 3" turboback + fmic etc..). I see full boost by 3100rpms. What does this setup change my spool time and torque peak to?

Second: I've done a lot of reading on head gaskets. Copperhead, Cometic and regular felpro's have came up. I do things right the first time so I will replace with quality when I swap this head out. Any advice?