I would use any of the shimano mtb triple cranks (110/74 bcd square taper) but use only the outer two rings. With any luck, you’ll be able to use the same bb. Run a 50/34 up front and an 11-32 in the rear. You will need a crank, a new rear derailleur, a new chain and cogset. For a rear derailleur, I’d find a clean used older Deore Xt or a shimano long cage rd or a microshift,
one problem may be the shifters. The older dura ace was not compatible with non dura ace rds. I don’t know the generation dura ace on this bike so you’ll have to do some research.
its not a no brainer to triplize a road racing bike as the chain stays are short and you may run into some issues. A compact crank will be easier to set up.
Last edited by bikemig; 02-04-20 at 08:15 AM.