It's painstaking work, and it's not done yet, but here is the result so far:
Better! Still have a ways to go, though, most of the work left to do is on the right side of the photo. It's so rewarding seeing this photo come back to life! I'll be working more on the contrast and tone of the photo as well as finishing the repair where cracks and tape residue have done their damage.
The restoration continues tomorrow. I'll post another version after I've made more progress.