Often the old style clutch is replaced with the newer style diaphragm type clutch. It is a smoother clutch with lighter pedal pressure. The to brg. must match the clutch type.
Luk is a good brand of clutch. The brass bushing is better then the roller brg. pilot brg. If the fork is worn down where it contacts the TO brg. It should be replaced or if you are a good welder like you say, you can build it up & grind it smooth.
George
