I recently completed a rebuild of my Nishiki Professional with some Dura Ace 7400 series parts, hubs, crankset, and derailleurs.
Calipers would not reach rims but T-Mar just provided some info on D/A calipers that would reach.
I also changed out the cockpit to Dia Compe Ene stem, Soma Hwy One bars & the drilled TRP brake levers.
Interesting that these new levers quick release feature has an auto release when you squeeze the lever.
Oh, new tires are Vittoria Hypers.
I am enjoying this bike.