That is a really nice car you have there. It deserves the best shot at fixing the top right. There is just too much weld area that has the top sheet metal pulled out of shape. Unless you are a very experienced bodyman, this may be too much to correct. A new, as in different, insert and someone that is a good at welding sheet metal is the best bet here. I think you will be very dissapointed if you try to save what you have. If it were a good sound "top fill" to begin with, I would say work what you have. But it isn't.