polyglas or rubber

It's been a while since Goodyear made a Polyglas tire, so you're having to deal with tire deterioration issues on that score. They were standard on Hemi E-body so an A-body should they be up to the task. The more square shouldered a tire is, the more prone it is to tracking. This means it will tend to seek out things like street car tracks and will be less gradual getting free of them.