Were early A bodies built better than the 67-76 models?

I think, the early A-Bodies were better built - if I compare my 66 Valiant to my 71 Duster, there are a lot of things (trim, interior), which are fixed with screws instead of plastic fasteners on the later models.
The Duster has a lot more plastic onboard compared to the older Valiant.
And all plastic parts become fragile when aging....