Actually I did not do the work I bought a basket case truck with it done. LJbear thought some of the work needed to be stitched up better. Overlap joints were used. The welds were done well and look like a lot of time and patience went into it to avoid warping.
I know just enough to be dangerous
Depending on damage whether floor pans need replaced. Removing rockers both inner and outer I believe need spot welds removed and best done with spotweld cutter. The top seams on this cab floor had a good body sealer put in the seams ontop after welds done for smooth look. Seeing this I may attempt to replace the rockers on one of my trucks one of these days. Need to get my own wleder and start practicing.