Wow! My car got trucked from NY down to NC and straight into the shop for several months to be checked out, had the fuel tank dropped and cleaned out, replacement of any clogged or malfunctioning things like a fuel line, and he said the frame looked good. I didn’t get all up in there myself - I’ll do the inside but I know jack-all about car mechanics so I leave that to a trusted professionalYou’re lucky. My rear differential mount cracked off the frame a couple years ago, and it wasn’t until I started taking things apart that I realized just how rusted my frame was. I had fist sized holes in it. I’m lucky mine didn’t collapse on me while I was driving. It’ll be much nicer when I have a frame that’s actually solid under my car.