:mumum:
I prefer butt welding of the top of the quarters. Makes it clean in the trunk. Spot weld the other areas.when doing the butt weld make a bunch of tiny little tac welds until it gets filled in. Place the TAC welds in random areas to minimize warping. Keep a little spray bottle to cool it off as needed. I also shine a light from behind to expose any pinholes. The other thing about quarter replacement is to be patient as you will have to trim and fit many times.