Sheetmetal work - compound curve

Thanks guys. I'm actually getting a piece from a donor for the passenger a-pillar, but thought this would be fairly easy...boy was I wrong. I thought about option 2 as I'm not scared of welding and grinding, but thought that warpage would be an issue trying to weld pieces with only one curve, especially after it has been bent/hammered on.
PoisonDart74 does have a point about the finish on these old cars. I've found all kinds of welding slag, pieces "kinda" welded together, welding wire hanging out under the package tray and other general craptastrophies :lol:
Most of this area will be under the trunk lid when closed or covered by the trim so I guess I really only care about where the glass seal sits and the top edge ( which i'm doing fine with.