I would say half of the A Body owners on here have had to patch their floors in some fashion. There are plenty of posts from members on here on how they have done the next step.
I put full rear floor pans in mine, plus made some extensions to weld on the front of them because the rust went further front of where the new rear pans ended. Were I a younger man, I would say the job was easy. I will say it wasn't extremely difficult, although my knees didn't like it, even with gel filled knee pads. But I got the job done.
