I rolled my cab gently onto it's back (and onto a nice soft 4x8 sheet of insulation foamboard) so that I could cut the old rusty cab mounts off and weld new ones on. When I disassembled my truck I found that a P.O. had put 2x6 wood blocks under the cab to support it because the cab mounts had rusted through and the cab was sagging on the frame. It was a job, but it went well with the help of my cherry-picker. I've spent the last 2 years on the frame/suspension and 350 motor. Now I'm reworking the cab. With any luck I'll be finished with the cab this year! Then on to reassembly!