I'd just swap out the bearings if the engine is still in the truck. You've got bearing wear, but who knows...maybe it was revved a bit high when still cold? The journals look OK.

The one bearing shows similiar to a couple of mine where it must be taper on the journal, or the block needs alignhoning, or something or other.

Most high mileage engines are down to copper, yet they get torn down due to worn cyl bores and rings. You oil pressure seems fine.

I might even only change the bottom halves. I would guess the top haqlves arn't showing any copper.

Plus....that surface coating is super thin. Doesn't take much wear to show copper.

But if your engine is out, it isn't a lot of work to strip the block and have everyting checked over. It's sort of up to you, and not a cast in stone thing.