Ken and Chuck:
Relax!!
Recently I tried to use a 70-SS-120 Campy spindle on a frame that was made for a 6 speed freewheel. While everything worked, the small ring was so close to the chain stay that it would rub the frame when under high torque. So I opted to use a longer modern spindle and now everything works fine. But then a new problem: the Q factor is more than I'm used too. So there seems to be some wisdom in Campagnolo's system.
Michael Allison
New York, NY