I've been using a UN54-107 for over 8k hard miles with Sugino75. Chainline is ''good enough.'
The crank will sit further out on the JIS taper, hence using 107mm.
According to Sheldon Brown, it will sit 4.5mm further out, although I have better than 3.5mm chainline offset.
I started with the Sugino 75 BB but trashed it during a wet grimy century ride, so decided to go sealed.
Al