Yes Sawzall it off should be pretty easy. I like the Miluake Torch blades for cutting metal like that. Cut up some truck cab corners a few weeks ago, the panels you need are a lot easier but you might want to get the inner and outer panels together.
The plus side is those lower quarter panels...
Another one could easily have the same rust or other issues and add finding decent AHB onto that. If thats the only major rust fix it. If you want to do it on the cheap knowing it'll come back fill with with fiberglass or bondo.
They fit but there are clearance issues with steering and other areas, nothing that can't be overcome with work. But but there's also not much gain unless you use the couple of bigger years of them. There are posts about both here.
If you drive in a place that's cold you also loose the heat...
I think paint code is usually on second row.
I like white but the problem with it is if you don't get all the rust fixed properly it's first to show it when it comes back.
The trunk flipper was originally riveted on.
The stud isn't needed and can be replaced with a bolt. It's only there to make it easier to install the starter. Not as bad with the mini starter but with the bigger one you're holding it in place with one hand trying to get the first bolt in blind with the other.
Unless you want to add bows across the ceiling to hold it up you don't. It's come down because the foam under the material breaks down. You could try replacing the material whole it's in the car but that would make a pretty big mess and gravity might not let the glue work properly.
That rust needs to be replaced with new metal. You can bondo it but it will eventually continue.
There's a different 1 spot for big blocks on the same cap. Ignore the differences and put the wires in the same locations they came off. The cap only goes on one way.
They drive like the typical car their age but not that bad even with worn out shocks.
The biggest thing that makes then sway and wave around is bad bushings and worn out leaf springs. Being an older one there's also a chance there's something wrong with the K frame.