I used King bearings for the rods (CR840HP and CR840HP-1, -.001 undersized) and mains (MB5116HP), which are standard sized 440. When I decided to use King bearings, the block work was already done, with Clevite cam bearings installed, fitted and deburred. I didn't see any reason to change them.
Call Todd at Competition Wedge, he usually has them on the shelf.

Brian Dunnigan