Ok, I got past the hump in the road last night. I had a snack, regrouped, and went to the 24 hr store and found some small grinding wheels/stones that I could chuck up in my drill.
Here's how I removed the bushings. Just drill a bunch of holes around the metal shaft, and pick out the pieces:
Then, after much grinding, filing, and sanding, I was able to get the metal sleeved bushing in (I went ahead and worked another 2 hours and did the other 3 too):
I then quit at 3 AM last night, after getting the new bushings in. My only concern is that after sanding the insides of the eyes past all the rust and making them smooth, the new bushings went in a little TOO easy. A few easy taps with a dead blow hammer, and they slid right in. I know the springs aren't going anywhere due to being encompassed by the hangers on both sides, but still, I would have preferred the bushings be more snug.
This afternoon, I hung the hangers and shackles, and my Dad stopped by, and we put the shocks on, and attached and torqued the leaf springs down. After putting on the P-brake springs and adding an elbow to the axle vent tube, it was ready for a bed! :
Just before dark, I cleaned up the threads on the bed bolts, slathered them with copper anti-sieze, and installed the bed! Man, the rear now rides the correct height, and the ride is so much better, with no clunking, and...wait for it....
the steering wheel is now centered when going down the highway! :
(Yes, that is road salt all over the truck. The main reason the hangers rotted the first time!)
So, now I just have to throw on the front shocks, paint the hood and front fenders, and this little guy is ready for another 100K!
Oh, and to answer the original question I asked at the beginning of this thread....yes, you all were right. The p-brake bracket IS a seperate part, and it just bolts on the outside of the hanger!
Thanks for all the help guys!

Until the next project....