The Joggle Stick
There is a great article in WoodenBoat magazine number 200 about fitting bulkheads. It is about cutting panels to fit curved and irregular surfaces. If that doesn't describe and Airstream, I don't know what does. After all, an Airstream is just a landlocked boat. By using this method, developed by 19th century British shipwrights, you would cut once and it would fit.
A couple of other articles in this issue cover the mixing and uses of shellac and the Sardine Stove, a woodstove small enough for even a Bambi.
For 62overlander, there are photos of beautiful mahogany joinery in the interior of a sloop named ANNA. Frank, I expect the interior of your ANNA to look just as good. (Among the other things that you are challenged to get done)
And no, I don't own stock in the magazine. I am not reproducing any part of the article because I respect copyrighted material. I think most people that are a bit handy could thumb through the magazine at their local store and understand the principle of the joggle stick in just a few seconds.
I hope this helps someone who has been looking at their gutted AS and gives them the courage to get started. "The days are getting longer---summer's almost here"-----I say to myself as I look out in the back yard at 3 foot snow drifts.