I put a Campy Veloce FD (new) on my 83 Peugeot. Due to the narrow tube and lack of a cable-stop, you need to do the following:
Get a clamp-on cable stop, it's just a clamp-type fitting that tightens with a screw.
Get an adapter to expand the effective diameter of the seat tube so the FD will bolt on.
My LBS had both items, super cheap.