Originally Posted by lovetheclassics
Its a shame as the rest of the car is totally solid... someone said as long as you spot weld one at a time and let it cool in-between the roof shouldnt warp!

think I might go down the filling with lead path, sounds safer
I'm afraid you will be disappointed. Once the sunroof is removed and you look in the cavity between the inner and outer panels, you will be shocked.
To lead-load it will need to be back to good metal and to do this will be when you find the problems.