I rescued a 1973 Trade Wind earlier this year, and our traveling stories are roughly the same. Our TW is almost identical. I didnít notice it at first, but if you can, look under the carpet around your couch and check your subfloor. We had water dripping down each side from the front roof vent, and also coming in from the dry rotted door seals. Needless to say, we thought we were going camping this year, but instead, weíre rebuilding. The smell was too much for my wife, so ours is currently gutted to the frame and getting brand new subfloors, insulation, wiring, etc, etc. My new axles are just a couple of weeks out, so itís getting closer!
I love a project, and so far this one has been fairly easy. Thereís plenty of info in the forums and YouTube.
I added a few pics of my current situation.
Good luck and enjoy the experience!