First let me say welcome to the TB.com message boards. There is a weath of informatin here and many very knowledgeable people here to help.
First... can you post a picture?
A stock turbo has a bolt on inlet bell. There are many larger turbos that also have this feature... but at least that will get you the series of turbo we are dealing with.
I am certain a picture on here would help in your quest to ID the turbo.
Again.... welcome.