My opinions-
I'd stick with the stock clutch, or go SB. I am NOT impressed with the LuK Pro Gold. I had one in a 92 W250 that I bought thinking a clutch had gone out. Turns out the adaptor from the transmission to t-case had stripped, and I would have to pay a 30% restock fee on a $400 clutch. I put it in, and it wouldnt hold a 14K GCVW load up a 5-6% grade without giving the odor of hot brakes. Didnt have a tach, but I know it was slipping.
Also, while you have it all apart, check the cam plug. It isnt that hard to remove the flywheel adaptor and starter. The plug can make a grand mess if it pukes. Had it happen to me and my 2qt/ oil change became 2 gallons in half that.
If you go with a pilot bearing instead of the bushing, will you have to get the flywheel rebored? The bushing is awful thin for a bearing to fit in the same space.
Daniel