Enjoyed your pics and description too.
I'm not surprised at the rust you've found, my Suburban has rust in many of the same places. I found some complete inner rear panels that I plan to use to when I repair that part of mine.
I have a '54 3100 frame in my yard that has a rear axle, but not torque tube or drive shaft. Around here that's an invitation to rust, but it seems to roll around easily this way.
I was considering using that axle under a trailer and thought if I can find another rear cover to put on the front that would keep the moisture out. Haven't checked to be sure its going to fit...
