I have been and my car was just finished and has been tuned. It's a beast now !! Some things changed and as of right now I decided to go a different route. It's not because I can't, more along the lines of a better opportunity came up and I took it. So with that said, the car does not have a GT500 blower on it but it can be done, it can't be done cost effective unless you know a lot of people though.
I'll be posting up a thread with pictures, graphs, etc in the next few days. I might even be at the NMRA race at Bradenton with the car. I just don't know if I can make it ... I've got a lot of little stuff to get done on the car.
I don't think you understood what I was doing correctly. I was getting the complete Roush R2300 TVS kit and just not using the blower (headunit) in exchange for the GT500's Eaton M122. It can be done. The blower (headunit), like I said before, will have to be machined slightly for some changes but it can work.