Even if there is rust or the engines are seized. All of them are able to be restored with new rubber seals, gaskets and polishing. This is like finding Tut’s tomb....simply give anything to be there when they excavate these beauties!
I used to get Air and Space magazine and it had an article on people who rebuild Merlin v12s several years ago. It was pretty cool but they were saying parts were getting harder to find. Luckily for them, they made a lot of spares. Can you see going into Kragen and asking for a Merlin V-12 head gasket kit?