Projects BUBBLE TOP'61 Buick front '61 Olds rear

I own a 61 Bubbletop Buick and had it parked near a 61 Olds at a meeting. Idea is interesting because the buick front and the olds rear are stunning masterpieces of GM bodydesign, but there is a lot of cutting and welding to get the side panels matched. i suppose you have to cut open the whole side to get it straight and smooth. And think about the door.