Ok, here's more pics of the damage in case anyone wants it for reference. The drive shaft is definately bent. It rubbed the yoke through the housing tube. I still think one of the u-joint bolts came out and started all this.

So it looks like I need a new drive shaft (front part) with the tranny end yoke. I also need a shaft housing. And I need the u-joint that connects the shaft to the tranny and the bolts. That's the bare minimum. I should also replace the other 2 u-joints, carrier bearing and rubber while I'm at it. Is there any difference in these parts for my 3600 3/4 ton compared to the other models?

http://www.stompboxrocks.com/pics/50chev18.jpg
http://www.stompboxrocks.com/pics/50chev19.jpg
http://www.stompboxrocks.com/pics/50chev20.jpg
http://www.stompboxrocks.com/pics/50chev21.jpg
http://www.stompboxrocks.com/pics/50chev22.jpg
http://www.stompboxrocks.com/pics/50chev23.jpg
http://www.stompboxrocks.com/pics/50chev24.jpg
http://www.stompboxrocks.com/pics/50chev25.jpg
http://www.stompboxrocks.com/pics/50chev26.jpg
http://www.stompboxrocks.com/pics/50chev27.jpg

Thanks for helping me learn about it. This place is a valuable resource. I'll be sure to study up before bugging y'all too much :-)

Greg