So doing some of my own research on this. From what I can gather it is about a 30 rear wheel HP gain for this mod. Katech or Kong are the only places so far that I can find that perform this type of service. It is pretty pricey but is also includes a new top pulley and hub as well as a 103mm throttle body for about $2100.00 USD plus shipping. You have to ship your supercharger and snout to them. That is all I know so far.
My conclusion is once I get the car I am going to drive it for the summer and see how I like it.