OK, got the carpet pulled out today and found ZERO rust.
I knew the high hump conversion was done since it was originally a on the column shift and when I bought on the floor. I guess they messed up the original cut for the transmission and covered it with thin metal. Will get that welded up after I get the transmission in and figure out where the hole needs to be....
Overall very pleased with the floor of the truck. I thought for sure I would have some metal work to do.