The job was supposed to take a couple of hours.

Put up temporary supports, cut the steel rods with an angle-grinder, working off ladders. (oh, and go get the generator, grinder, spare blades, fire-extinguisher ), saw through the treads in sections, take down in sections, carefully.

But of course, if you have a fifty year old vehicle and a bit of blue string, there might just be a quicker, safer, and easier way...