Matt I'm sorry I can't remember the exact turbo I used. It was a stage II garrett tho. I sold that car about 7-8 years ago. I gave the guy all the receipts and catalogs I had also. I bought the turbo from ATR. Maybe check some of the Buick turbo forums. I'm sure those guys can tell you exactly what you have. Sorry I could not be more informative.....

G.