I have a late 70s Nishiki International that I have converted into a single speed. I have removed the the older crank and replaced it with a used shimano 600 and noticed that the shimano crank sits further out on the 68 x 127 mm BB spindle. This distance is 9.5 mm between the crankarm and the BB cup. I have respaced the rear axle as well as redished the wheel in order to establish a straight chainline but am not so happy with the "look", In my eyes the drive train seems to sit outboard just a bit more than I would like.
I'm thinking about replacing the loose bearing BB with a sealed unit, which leads to my question. If I were to choose a 68x110, x113, x115, would this reduced width alow for the shimano crank to recess nearer the BB while considering clearance for the crank arms along the chainstay? If so, I assume that I would once again need to respace the rear axle.