I have a couple of 70s era bikes that have Campy Nuovo Record on them. They're essentially wall hangers that are only occasionally ridden. I plan to leave them original for the most part (the exception being clincher rims and modern cables). They are what they are. However, if I were to build a mid to late 80s era Italian classic with more modern, yet classic-looking Campy parts, I'd put together a mixed group that delivered improved shifting and braking.
Something like this:
Crankset - C Record with 10v rings,
Ergo Levers - either silver Chorus or Centaur 10v or 9v Record converted to 10v,
Brake Calipers - early 90s Record dual-pivot (they only say "Campagnolo" on them),
Rear Derailleur - Silver Chorus or Centaur 10v,
Front Derailleur - Silver Chorus or Centaur 10v, and
Wheels - Silver 10v Campy hubs laced to polished TB14s with nice, SS/DB spokes.
That set-up would provide more modern functionality with the silver bling that an 80s Italian steel classic deserves.
Texbike