I don't know enough about Boice Crane's production methods. If they used stock bearings, even though oversized, you shouldn't have a problem if you are interested in performing any repairs that might be needed.
However, if they used OEM bearings you could face some real challenges. I have restored several Walker-Turner machines. Bearings, sleeves and other parts for W-T were often peculiar to W-T. Hence I've faced having to find a) another W-T machine to cannabalize, b) someone to machine parts for me or c) give up. Very frustrating!
Good luck! Keep us in the loop.