Here is the scoop:

A) 722.600 has less friction count than 722.650. Since you are dealing with the same engine you will not have issues.

B) Any valve body from +98 to current generation 722.6 will work with any engine(I4,I6,V8 & V12). 96 & 97 722.6 valve bodies will not work with +98 TCU's. The shifts are determined by the TCU software.

The wisest thing you can do, so your work and effort does not go in vain is to replace:

A) K2 copper bearing as that is the reason yours failed. It would be really dumb not to change it.

Input Shaft Bushing - 68410-01 - Sonnax

B) Next, Change the pump bushing and stator bushing

Pump Bushing - 68004-01 - Sonnax

Rear Pump Stator Bushing - 68915-01 - Sonnax

C) Change this guy out too:

Regulating Pressure Control Valve Spring - 68942-01 - Sonnax

D) Lastly, do put a new torque converter as it contains frictions. They are $150 to $220 for the 722.6 rebuilt. The brand is CVC, and What ever it takes sells them. They will need your core.

Torque Converters Distributors Page - Consolidated Vehicle Converters, Remanufacturing Torque Converters for Automatic Transmissions

Here is the service manual, and right click and save-as..

http://www.all-trans.by/assets/site/files/722.6.pdf

Exploded Diagram:

http://www.jpat.co.uk/60%20Mercedes%202A%20722.6.pdf

Hope it helps,

Martin