Lower-trim level Corvairs came with rubber mats on the floor instead of carpet. The rubber does an excellent job of retaining moisture, so Model 500 and 700 ‘vairs usually have rusted out floors. As I mentioned in yesterday’s post, Betty’s floor is a kludge of sheetmetal and Bondo, and I believe the former is only held in place by lots of the latter and a couple bolts. Here are some photos.
Behind driver's seat / Behind passenger seat / Driver's footwell
Underneath the car