Nice Numbers!
I have a 99GT and am running an extremely similar setup as you, except I'm running a V2 SQ blower (intercooled) at 7.5psi and 91 Octane I'm getting 381 RWHP.
The only differences in our setups is the V2 SQ Trim vs. the T Trim and I'm running the stock t-body and intake.
What boost and what octane are you running? What A/F? Got a dyno sheet so I can see more detail?
Great numbers though!
S