I spotted that Chris Walker ran with all sort of different configs around that time - some times running standard calipers rather than deltas - but on this pic (and again thanks Chris for an amazing archive) he appears to be running the same Simplex shifters as 'my' bike.http://www.flickr.com/photos/14202218@N ... /lightbox/
Tim - thanks for taking so much time, to write such a detailed response.
I don't see me switching to clinchers, because if there's one part of the bike that (aside from the delta's) told me it was something special - it's that' the Campag Sigma tubular rims - they're keepers, because you see them on so many pictures of LeMond
I'm thinking I'm going to do what I can with elbow grease, and then some subtle touch-up paint, a respray can happen at any point in the future.
My father used to keep classic cars, and it was always a challenge in ensuring they were period correct, reliable (ish), and safe - I think I'll follow the same principles, but intend to keep riding it occasionally.