PT&E .82 A/R exhaust housing on OE turbo??

[turbov6joe]

I'm looking for some input on this mod I'm thinking about doing. I recently purchased a TTA and would like to modify the OE turbo with a PT&E .82 A/R exhaust housing. My idea is to see how fast I can get the TTA to run with the OE turbo and this housing. I figure this housing would increase the top end charge significantly and reduce back pressure enough to make some HP gains. Right now I don't have the $$$ for a altogether larger turbo, so I figured this might surfice for now. TIA
My questions are:
1) Has anyone done this before?
2) What were the results good or bad?
3) Did it increase turbo lag much?
4) Was this mod worth $150 for the housing?

 

[TTA89]

Go to www.turbobuicks.com and page Mike Savino, He was able to put his GN into the 11s with a stock Turbo and 82 housing.

Look at the link in my sig, You dont really need to touch the Stock turbo to make the car haul but to each there own