I haven’t put a wrench to anything on it yet, but judging by condition it should be fairly easy to disassemble. I don’t think the wheels or hub had many miles, and looked to have been stored out of the weather. The 13-30 freewheel looks very nice too. A donor heliocomatic hub will be coming soon from kind member Dave. It looks like a pretty straightforward wheel build for a first try. It seems like those concave Weinmanns are well respected too.
I will probably update this post with tear down pics and rebuild pics too for anyone interested. It may be useful in case I or anyone come into one of those nice vintage Treks with this hub. As a first note, I did not need a tool for lock ring removal. I wasn’t going to go at it with a pliers, but did try a small strap wrench and it came right off. Looks like a fun project and perhaps a worthy restoration.