I have that turbo and it is excellent. I have an external WG controlled by a Greddy Profec B2 system. I need to dial it in. The WG is a Tial 42 mm I think. The exhaust vents back into the DP.
You may need a spacer for the stock manifolds and also to grind a bit of your AC bracket in order to get it to fit.
Click on the link in my sig to my build thread. The first post has a section on GT35R installation. HTH.
Thanks mate, very kind of you!
Here is a pic I took when I was building it all...
DSC00166.jpg Photo by UKTyphoon | Photobucket