Finally got the car tuned and on the dyno today.
Twincharged GTP Dyno - YouTube

Made 410whp and 413wtq @ 17psi with an unlocked converter (HP Tuners apparently can't lock it in third gear in the Grand Prixs), and 225 Intake Air Temps. Steve (tuner) and Kevin (dyno driver) were scared ****less when the car moved around on the dyno like it did (I told them to cross the straps, but they said it was fine).