Once tear down began, it became apparent that I would need to source a parts car to rebuild the TA since so many of the panels were in need of replacement. I found my parts car in a 1980 Indy Pace Car Edition Turbo TA, which was acquired for $1500, complete less the turbo, but disassembled.
Here is the gutted interior - the floor was so bad, you could, and I did, step right through it. Fortunately for me, the prior owner had thought enough to cover these holes with dynamat.