I rebuilt the turbo in my 1984, to cure an oil leak. Kit was ~$20 on ebay, and many youtubes. Generic kit. Included the exhaust flange metal gasket (standard size, T3 or T4, forget), but I used a stainless gasket I had prior. The O-ring for the compressor housing is too big, apparently in all kits. I cut it and super-glued to size. I forgot to mark the compressor to exhaust alignment, but apparently doesn't matter since individually balanced. I am sure that removing all the oil gunk from the compressor wheel improved the balance, not that I ever heard anything before or after. That one is a Garret (external dump rod). My 1985 has a KKK (internal dump w/ heat fins), because an earlier replacement engine. I recall the original is a Garrett. I didn't feel any play in the shaft before or after, but the oil leak seems to have stopped so perhaps it helped. Removing it is very tricky since no room to swing wrenches.

To insure your turbo is working, temporarily plumb a boost gage in your cabin, by tee'ing off the tube from the intake manifold. You should see 9-12 psig at high rpm. Some people goose it up, but that risks melted pistons.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans