What's in stock and my desire to ride it today made choice real easy. I picked up two UN26 untis - 113 and 117.5
113 worked perfect for my application, chainline is straight as an arrow, good clearance for cranks and chainring. Quick measurement put chainline at about 41.3mm
If I were to put gears on it and go with double or triple - 117 would fit for sure, 113 would be too short.

Thank you everyone for your help - made me very clear on BB measurements, something I did not really put a lot of thought into it as most of my builds were perfectly re-usable loose ball bearings BBs or external BBs with plenty of adjustment.