There will be Campagnolo Gran Sport headset fitted, as the steerer tube is quite short, it has only 37mm of stack height, so there are not a lot of alternatives. I have Gnutti steel cottered chainset, but maybe I'll fit Stronglight 49D, I'm not sure yet. As for derailleurs I have few from 60's and 70's, nothing older... As for the brakes I have a very nice pair of Universal 68, almost unused, so maybe them.