[Tempest67]

I was hoping that the rear floor could be patched, but when I removed the factory seat frame it became clear the the entire floor was needed.

So, here we go, first I drilled out the spot welds for the 3 rear support brackets of the cab, and made a paper template of the floor. (2 pieces of metal)

Then I traced the patterns onto some sheet metal, rolled some beads, and welded it to the floor.

When this was done, it looked OK, but the floor has some 'play in it', as the seat frame obviously provided much support for the floor.

So, I installed another cross member from side to side of the cab, about 6 inches behind the rear of the transmission access plate.

I then sprayed some undercoating black paint over the underside of the floor