Very nice. My high school bike was a Nishiki as well but not as nice as this. For a crank, why not run a 110/74 bcd shimano triple as a double? You can either run it as a 110 bcd double (with a low of 34) or as a 110/74 bcd double if you want to go really low. Those are easy to find and relatively cheap. Or just run it as a triple.