This looks like an excelent start to a renovation thread. As you've already found, this is the best place in the world to obtain vast amounts of Airstream knowledge. You and I and several others are going through the same process on our vintage Overlanders, and I have no doubt we'll all be able to help each other at some point.
I think I mentioned this before on another thread, but I think the absolute best way to research your own restoration/renovation project is to read the resto/reno threads written by others who have gone before you. Here's a link to a thread that has links to all of the major renovations. They are lengthy, but I've read through each of them at least a couple of times already, because I think they are that valuable.
links to the major renovations
One other suggestion on renovation threads that I think works really well-- when you have a specific question, for example something related to the LPG tanks-- I think it is best to go to that sub-forum to ask your question, which will provide the maximum visibility to others on the AirForums who might have information to contribute. Then, when you have your answer and/or resolution, post a link on THIS thread, to the other thread where you asked the specific question. I hope that makes sense?
Also, a lot of the time your specific question might have already been addressed, so a quick Search of the specific sub-forum related to your issue will probably yield some helpful results. Then, if you don't find the exact info you need, you can post a new question to that specific sub-forum, and link it back here once it's resolved.
Anyway, that's just a suggestion, but I think that method will both allow for more information to be contributed to each question you ask, as well as keeping this thread less cluttered and easier to quickly glance through for project progress documentation and updates.
Good luck, I'm looking forward to following your progress. I'm VERY partial to the '58 - '63 Overlanders, and it looks like you found a very promising one.
-Marcus