They are delaminating from age. Time to replace them. While its out replacing Mains and rods wouldn't be a bad idea. Also all the core plugs, oil pump, and distributor bushing. If your that far the rings, And then have the heads done. True roller chain would be a no brainer. Throw that in while your in there.
So the engine was just rebuilt like 7 years ago. 10k miles and regularly driven just not very far. Doesn’t mean the parts they used to rebuild were not older or stored improperly.
Engine is going to the shop. A list of stuff I was already doing is above. This just set my timeline back. Engine shop will do these bearings and check everything else out while in their hands. Thanks for the info though, I can see how that is more of a delam issue versus gouging.