Help ID the Mystery Centrifugal Supercharger!

I got this blower from the previous owner with the purchase of my car. Apparently it is a Paxton military surplus piece that he picked up, along with a blow-through Stromberg WW and a blower box, with the potential intentions of making a force-fed /6. The trouble is, I don't know any technical specs on this unit. I believe the previous owner told me this thing flows 550cfm, but I can't remember for certain. Anybody ever run across this unit or something like it? If I can find more info on it then I might consider throwing it on the old leaning tower...