Today I welded up some bracing to attach the body to the new structure. Once that was in place I started cutting away the old unibody sections. I have a lot more to cut away and I will have to turn the car up the other way to complete it. It will have very little left of the stock unibody, other than the inner suspension mount brackets there will be no sign of the factory stuff.
The back end of the car is very light now and takes very little effort to pick it up. When all of the old unibody is removed the car will be even lighter. I will probably move on to the front once the rear is cut away instead of trying to make new plastic inner fenders and panels for now. Doing all of the inner fenders and other plastic work at once will probably be easier.