I just picked up a classic stumpjumper for a single speed conversion, I've been out of the game awhile and need help with the bottom bracket/crankset compatibility. Bottom bracket shell of the frame is listed as 73mm. Listed stock bottom bracket (I'm assuming that's what is still currently on the frame) is 110mm square taper (BB-UN72). What I want to do is throw some new race face cranks with a 32 toothe chainring on it. The only problem I see is, all the new race face cranksets I see nowadays utilize an external bottom bracket. Is my bottom bracket shell compatible with external bottom brackets? If so, can y'all give me some set up suggestions?