Thanks for the replies! The older Holdsworths that I saw had window cutouts in the head lugs, and I didn't see the Campy track ends on them, so I'm not 100% sure its a Holdsworth.

Also, It looks like a previous owner drilled the fork and brake bridge, not the builder. Its a little hard to tell from the photos, but that is what it looks like to me. If/when I restore it, Ill make sure to fill those in.

Anyway thanks again.