JR's 51 Oldsmobile
When we dropped the body back on the chassis after doing the suspension mods, we had to cut the floor under the rear seat area to clear the upper 4-link bars when the suspension is dropped. So, when we took the body off the frame again for chassis powdercoating we patched the holes in the floor like this. First I made some patterns out of some recycled cardboard.
The I transferred the patterns to 18 gauge steel and bent them in the sheetmetal brake.
The outside was tacked and then we welded the whole thing up from the inside. Before we put the body back on the powdercoated frame I shot some more 3M Shutz over the bottom.