I'm going through and freshening up my 360 and checked bearing clearances this past weekend. Mains are on the looser end on 0.0015", rods are on the tighter end of 0.0015", using plastigauge. I knew they were gonna be tight, but I'd feel a lot better at 0.0020"-0.0030". My crank has been turned 0.010" under and I used a fresh set on 0.010" undersized bearings to check this. The only bearings I can find to help with this would be these 0.009" undersized bearings:...
360 Bearings
