A couple of things I noticed. Steel is thicker. Dash still has metal in it. I think plastic dashes are kinda cheap feeling.
I complain all the time about the doors on 80-86, they just feel like crap to me. Flimsy, can't get them to seal right. Noisy. Door panels barely stay on. Compared to a 79 and earlier, the old doors just shut well, sound dense, and feel heavy. To me, heavy is better built.
There is a large dent just below the drivers window felts on my truck. It is there, because of years of closing the door by grabbing the window sill with the window down. Literally, the metal is so thin, that the door skin is distorted because of simply grabbing the window sill and closing the door. That is not good quality.
With that said, I still love the bullnose. I'm just envious of the older and IMHO better looking interiors of the 70's.
1988 F250 Supercab Longbed 7.3 IDI, C6, 1356, GEARVENDORS, 4.10 Sterling with autolocker
1986 F150 302, C6, 9" 2.75, Wood Flatbed