The nice thing is you can save yourself $90K and just do a Cam / Procharger install with a 10psi pulley and make more power from the stock LS3. We made 631whp on 8psi and with 2 more psi and meth the car should make 680+ hp at the wheels (We will find out for sure next week).
Don't get me wrong, the LS9 swap is cool, it is just a bit of over-kill if the goal is making power instead of simply being unique.
Jeff