Here's my full Campy 1980 Motobecane Le Champion that I purchased from the original owner about ten years ago. All that had been changed on it when I bought it was the rear rim (which he has changed after it was bent).
I swapped out the saddle and put new Hutchinson tires on it... that's it. I rarely use it, but have been offered $1,000 for it. I'll never sell it, as frames in my tall size are hard to come by. Rides great!

BTW, is the Phillipe stem original to the bike?

Fred