PS remove the shitty ass rocker stoppers. Anyone who says they built an engine and put those in have no fucking clue what they are doing. That's a good way to destroy pistons and valves vs just losing a rocker or shim
Those cams are whipped. I will also be checking the cam caps and bearings. If you had no pickup or broken screen, low oil pressure to the head will cause this issue as well. Or with no screen, a bunch of FOD just whipped the cams and various other bearings throughout the engine
Full tear down.....