One of the things I was thinking, that is if there were a way of separating without destroying the two halves of the hood, was possibly opening up both of the two decent hoods I have, (after experimenting on the 3rd 'scrap' hood I have) and cleaning up rust etc, straightening the rust-free, date-correct hood up better from the inside (it has a really long scrape about 1/4' deep and about 3ft long near the outer body line, about 3 inches away from the fender's inner edge~ this is the result of a "friend" who was carrying a VW bus on a forklift and didn't see my car, scraping the hood nearly the whole distance and he didn't even stop till the windshield was laying basically inside-out, happened circa 1991) I was planning, should I have decided a way to accomplish this, while they were open both open, to decide which top half would need the least work. I believe the better top half would be the '68 but more could be revealed once it was looked at thoroughly where you cannot see up front on the leading edge.
I see the spot welds do not look to difficult to remove, but I wondered if there might be a tool that rolls the edge back up, similar to the tools you can find that can roll it back down without hurting the panel...like a seam spreader of sorts.
This was just an idea I had, I was inspired by somebody reworking an old caved in and rusted trunk lid by separating the halves, he did it because a replacement wasn't available, even reproduction. I think it may have been in a youtube video about rust encapsulating if I remember right.
Well, it WAS just an idea, I am not going to destroy good original metal if I cannot do a nice job on them.
Richard