Its a schwitzer turbo built in the early 60's. It has a small amount of shaft play, so it might need new bearings, and seals which are really cheap to have done. Its one huge turbo, the compressor housing is about 11" in diameter. They are originally from I-6 diesels. I was gonna run it on an aluminum olds v8 I had. sold the motor and no longer need the turbo. $100 shipped.