Slant 6 timing chain lubrication?

Wow, great replies! I took single pic of the front main bearing, if someone could just say yeah or nay?

This first pic is the main bearings that was in it: It was a running engine


1) do I chamfer both these spots


or 2) just one spot?


This is just a pic without spots


IF I go lightly, would this dremmel bit be ok if I go very lightly?


Thanks to all!!!