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Turbo ID
It looks like a Garett to me, but I can't tell by your pics. There were 2 that I know of. Air Research and Garrett which are actually one in the same since Air Research was bought out by Garrett. They are just a little period specific depending on the year of your ride, but they interchange. Hope this helps you out a bit.
Turbo Recuild
Check out the Yahoo! Forum message #s 672 & 357.
http://www.powertechnologies-turbo.com/index.html
J&H Turbo 662-378-8711 (No webpage)
http://www.powertechnologies-turbo.com/index.html
J&H Turbo 662-378-8711 (No webpage)
Mitsubishi TD-04 Turbo
The turbo pictured is a Mitsubishi TD-04 - Looks like one from an inter-cooled Vixen application of the 524TD engine.
Mike
Mike