changing bodies
It could be done with some saw horses and some long 4"x4"s and a jack. Or if you have an over head hoist, big fork lift/front end loader, a hell of a lot of friends or just use a sawzall and cut the old body up to pull it a little at a time.
I've cut the bodies off a few vans.
You'll need to get all the wiring and everything pulled/unhooked from the body. Remove all the body mount bolts. Then you'll have to lift the body high enough to get something in under it to support it while you roll the chassis out from under it.
It's not a super easy job but it's not super hard either.






