The separation inside the body is a concern, but if it's repairable (and with your skills, I'm sure you are right in saying it is) then it's not necessarily a big deal.
I really like the idea of coming up with a second neck, either an original via Ebay or the much-esteemed Dr. Bassman brand, and archiving the original neck.
It's unfortunate how inadequate the term "short scale" turned out to be in this case.