I have a Univega hybrid frame that I am having powdercoated for a build. The 1" threaded headset that is pretty beat up cosmetically, but the 27.0 mm ID crown race (actually measures 26.97 with my Brown and Sharpe calipers) looks fine.

I would like to buy a black Tange headset, but the ones I see for a decent price are 26.4 mm ID crown race. Can a 27.0 crown race be used with a headset that comes with a 26.4 mm crown race? Or are there other dimensional differences that will cause issues? I understand the fork can be milled, but I live in the middle of nowhere.