You definitely have issues. Quarters look heavily mudded already, looks like sag at the back of the rockers/front of rear leaf perches, rockers themselves are suspect as well. Are the doors difficult to open and close?

You will need to find a shop that does welding on older vehicles. Even a shop that works on farm tractors or trucks can be better for structural work than a shop that does newer car collision work only. You need to find a welder who can rebuild your car's supporting framework.

With that much rust evident, trunk floor, shock towers, gas tank supports, and subframe mounts are worthy of detailed inspection.