Thanks! I really appreciate the help!
Last time the bearing went out it took it's time and just kept getting louder. This time it happened a little more quickly and more dramatic, and I had trouble getting it into any gear except second to get it home. So I'm hoping I just need to replace the bearing again and everything else is fine. I actually replaced the clutch and plate a couple years ago when I swapped the automatic transmission for a manual (that crapped out a couple years later), and we are getting unfortunately too familiar with dropping the transmission now. I'm also trying to source a pilot bearing and I'm going to try and replace that too. It seems like the pilot bearing is easier to find.
This is my fourth Brat and I've had more trouble with this one than the other three put together. I guess that might have something to do with it being almost 40 years old. :-)