The guy I got the turbo from (in trade for a set of tires) gave me theese specs on it:
Turbonetics HP72 T Series
P Trim .68 AR

I don't know enough about turbo's to know how to confirm any of it. I wanted to use it as a rear mount on my F250 but figured that may not be as easy as I thought so I gave the turbo to a friend of mine who wanted to use it as a rear mount on a Camaro but never got an engine for it so I can get it back from him if I want to use it.
Started thinking about the thing you said about stock stuff and realized you were not talking about ditching the turbo, just running an adapter to the intake for the charge pipe. Brilliant! (don't know why that didn't sink in before)
I think that may be the ticket for me. So with that in mind I guess my search will definitely be on for a Buick turbo. If I can manage to not screw up the intitial, super simple setup then I can move on to something more elaborate.