B"H

One true 4 door hardtop with Unibodyconstruction that comes to mind, is the 1965-67 Corvair Sport Sedan. It was a true 4 door hardtop with unit body construction, and was available in both Monza and 500 trim levels.

Also, the full xize MoPar cars, like Dodge and Plymouth, were true unibody 4 door hardtops as well...Bill H.