I got a copy of DesktopDyno2000 today and I plugged in all the info from my engine and I was Pleasantly surprised. The original estimation I was given from the PO was around 380 hp. I pulled out all the receipts from the parts and work done to the engine, and the specs from the parts, and I found it a little more...
It looks like around 429hp, with a peak tq of 421lbs/ft