74 power wagon dream truck...

One thing for weight I'm planning on picking the cab clean for sandblasting..
I do have two engine stands and two motor hoist...
Right now I'm leaning towards the third picture I posted and like you did rolling it on its back, but maybe on to a piece of plywood to spread the load...?..
Roll on its back, I would use an old mattress to cushion it.
To move it around, you could build a cheap wood frame, with harbor freight casters.