Wonderful find, great story. A fine bike finds an owner who appreciates it - excellent!

Yes, there was a time (early to mid 1970s) when they had problems with the bottom bracket hangers - I had one, and the only way a very fine LBS could find to keep a BB in it was to (a) use a Phil Wood and (b) use the industrial-strength level of Loctite. Otherwsie, it was a great frame, and I still curse the @^#$%!* who stole it out of my garage over 20 years ago. And yes, there was a time after Bob Jackson sold the company and the new owners damn near killed it, but, fortunately, Mr. Jackson came back and led the resurrection.

In any event, your frame was built well after these problems were resolved. Very, very nice.

As to switching over the campy stuff - why not? I am a big advocate of setting up your bike(s) in a way that makes you happy and want to ride it/them, so long as no hacksaws or other butchery is involved. I say, if that flots your boat, go for it.