Rebuilt Engine bearing wear

Ok, what’s the background on the pistons and bores. New pistons? Bores honed, bored, surface prepped? What’s the piston to bore clearance? What’s the piston? Forged? Cast? Hyper? By the looks of those bearings, as stated before. They show no signs of distress. You have ID’ed the cylinder, ok, but it could be a piston issue. It’s a dull thud? History of the rods? Rod side clearance? At this point you can’t trust anything you haven’t personally checked.