Thanks @dvderlm . Oil distribution looks ok (prior to last starvation event of course) in camshaft housing. My plan is to refinish all journals on camshaft by hand (damage is manageable with sandpaper wrap and polish while in-engine), run seafoam through all oil passages using an external pump, blow air through all oil channels, clean out oil ports on camshaft and seats, replace bearings, replace oil pump, fill with oil & new filter, test oil pressure. if ok, run for several minutes, remove sump, check for any residual metal shavings, remove cylinder 1 conrod cap, check for any immediate wear, then if ok run for a week or so, then recheck. At this point, I can only assume the engine had oil starvation before we got it and I created this event myself by not replacing the bearings when I had it open previously to change oil pump.