I found out last summer the frame was Swiss cheese behind the fuel tank. I was quoted $1000 to plate the frame and fix it. I found a rear half of a frame in pretty good shape but held off the repair and let it go through the winter. Last week I found out it was far worse now. Pretty much the top rail of the frame and the cab mount were the only things holding the drivers side together. A friend with a shop helped me and we have the project almost finished.. Here are some pics of disassembly.