I thought about boring as well. Not so sure it would need it. The factory bearings were not bored or honed. Any misalignment of the case bores themselves would have likely been there since the cases were machined. I don’t know what the main bearing oil clearance spec is, but i would think matching the bearing OD and ID of the originals would preserve alignment provided they were seated straight, and to the exact same depth as the originals. a look at the catalog from King bearings tells me it could absolutely be matched up.