I can back Brian's claims on boost. I had the 3.125 pulley on mine and had to take it off because it was making way more power and boost then what I felt was safe on my stock block. I am running a 3.6 and making 14psi @ 7000rpms now.
I was making 16-17 psi with a 6 rib belt through an aftercooler with a 3.12 pulley.
Brian, Do you have a regular TKO? Or, have you done any work on the insides of it? IEro-shifting, etc. I am installing a TKO in my car now and was just curious. Also, what rear suspension are you running? Nice car, BTW