Thanks Dave,
I spoke with Turbonectis and they confirmed what I had found elsewhere,
2.795" 2.437"
Looks like I'll be building my own turbo using the rest of the parts from a SC-5252E from PTE.
Really wanted the SP61GT but who knows when those housings will show.
Too damn impatient I guess.
Looking forward to meeting you in Lexington.
Dan
Edit-
Or maybe the PT-61 which I have a strong feeling that the SP61GT is based off.
I would like a Garrett GT wheel though so will look into that as well.