rusty roof tear off

make sure and weld in temporary support beams to keep everything lined up bcoz once you start cutting the roof can get weak if you have enough rust and fold the car in half (extreme case) ......but the roof is structural and if it moves around even a 1/4 inch can cause some real problems on the install of the clean metal/roof. i did this on a duster and as said already, you dont always have to use factory seams......i would take out as little metal possible to still get rid of the rust...........also take lots and lots of measurements before cutting anything......especially around the window plugs.