Lets see...my '76 Dart Sport in 1986 had the following issues:
Rusted inner fenders on both sides to the point they were came within 3-5 inches of the firewall.
No floor boards in the back, they were rusted out.
Two big holes in the driver's floor, one by the brights, the other next to the transmission hump
Both rear quarters were beginning to fall apart.
The spare tire wheel was filled with 3-4 half dollar size holes
Yes, it was in the "rust belt"...