Brad, that was what I originally considered doing. Not with donor parts, because junkyards here in the Northeast have been reduced to part and scrap operations over the last few decades.
I was planing to buy new repro panels and cut the corners out and weld them in.
However when I got the panels and looked at the construction, It occurred to me that replacing the complete panels required less actual welding (butt or overlap) than doing the corners. The only linear welds are the outside top joint from the back window to door post. Everything else is spot welded seams. In my opinion, easy to locate, clamp and spot.
As I said, just my opinion and everybody has their favorite type of welding.
