I luckily stumbled across some more information on the I recently bought. It is 100% the supercharger I bought.
Magnuson MP112 For Sale
It's a Magnuson MP112 that came off a 05 Cadillac CTS-V.
The original owner had a new transfer shaft spun and billet spacer made to fit truck accessories. With the new transfer shaft length and spacer it "should" fit pretty much any setup with the cathedral port heads. It has 35 lb injectors and over $1000 of professional port work completed.