Use an after market centrifugal supercharger. You can have a custom plate CNC'd to mount it at the necessary angle for the belt to fit. Then just have 2" mandrel bent tubing running through and aftercooler and into the throttle body.

This way will allow you to save ALOT of money and headaches, while still allowing you to make much more horsepower than the 20hp difference between the VQ33DE and the VQ33DE with SC.

In addition, it will allow you to customize the look of the engine bay, while an after makret ECU...say AEM EMS ($1,000) will allow you to have your X tuned for maximum power, reliability (proper A/F ratio), and efficeincy.