Cutting it will make the shifter shorter but no make it a short shifter if that makes sense
You can look into UpRev for tuning. They have a tuners package I believe that will allow you to tune the car yourself. Other then that I have no idea what is out there.
There was someone else on here who brought up the rear mount turbo thing. There was a thread on it. I say go for it if you have the funds. An intercooler isn't really an issue. You can tuck a sidemount in the wheel well and it will be adequate enough for low boost.