Hybrid turbo ID?

[sen2two]

I have this center cartridge that is supposedly a Garrett. I bought it as a S4 hybrid turbo which turned out to be damaged. So I'm rebuilding it and looking into making it better. I'm really wondering if i can convert it to ball bearing.

There's no stamping or ID plate on it either. But it does bolt up just fine to stock FC turbos. I have a Air Research To4B compressor on it.

Here's a few pics of it.

http://i282.photobucket.com/albums/kk253/bboynero/Ktecmotormounts2.jpg

http://i282.photobucket.com/albums/kk253/bboynero/Ktecmotormounts3.jpg

http://i282.photobucket.com/albums/kk253/bboynero/Ktecmotormounts4.jpg

[Nismo]

The A cast into definitely looks like the Airresearch Logo that Garrett used many year ago... That's about all I know about it.