Brian,
Here is my twin scroll set up. I have a T4 turbine with a .58 Aspect Ration. It pulls like a Mack truck for 2000 rpm all the way up to 6500. I specified what I wanted with Brian at Comp Turbo. It is a T3/T4 hybrid with the ceramic ball bearing cartridge. The headers were also of my design and I had a local fabrication shop (Maxwell Industries) modify my Zuc-Z headers.
The engine actually needs a higher aspect ratio (its EFI), but for a CSI system, it would work exceptionally well. Here are some photos
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http://forums.pelicanparts.com/uploads20/IMG003791329944078.jpg[/img]
