Might have some info for you, 6.5DD.

Talked to Peter at South Bend Clutch to order my replacement kit. Their kit comes with the flywheel, clutch disc, pressure plate, alignment tool, and throw-out bearing. I asked if there was anything else I'd need or that he'd recommend. He mentioned the tranny dampener again and also suggested replacing the fork and pivot ball - which I said was the reason I was going in there in the first place... He said that it was all pretty straightforward, but that there was one common mistake. He said to make sure that you put the clip and fork into the groove of the bearing together - don't split them apart. Without seeing it first hand, I can't quite picture what he was saying, but he said I'd understand when I saw it. But he said that people commonly split them apart and then have engagement problems.

Having done the replacement, if you can picture what he is saying and didn't keep them together that is likely your problem. Hope that helps!