I have to replace the support bearing on the '84 300D Turbo. Should I replace the bearing dust cover and bearing support at the same time or just the bad bearing?

Is the u-joint at the front of the rear driveshaft replaceable or does it require replacement of the entire shaft?

Thanks.

__________________
Steve
'87 300TD - 132K - Soon 4-Sale
'84 300D Turbo - 122K - Driving
'77 VW Type II - 77K - Restored
'08 250EX Ninja
English Bulldog (Brier) - My best friend. Passed away 12/02/04 while in my arms.