I just picked up a Bianchi Stelvio... I believe an '85. Looks to be a campy drivetrain originally. It has cranks marked Bianchi, but the chainring bolts read Ofmega. I have a nice old dura-ace freewheel I would like to put on, but I'm not sure of its compatibility with the chainrings. Do I need campy or campy knockoff stuff (i.e. chain and freewheel) to run with this crankset? Thanks.