Someone went overboard on oiling restrictors. You can't get at them without disassembling the block.
They are threaded up into the oil passages rising off of the main bearings.
This is likely a case of "a little knowledge can be dangerous" in the case of this engine "builder"
The damage is likely just limited to what you see on the cam and the lifters now.
The valve train often gets way too much oil anyway.
Pull a couple of rocker arms. Look for oiling issues with them. They are kind of expensive and you don't want them wrecked.
I still say that "roller camshafts" are just not worth it. I stay with solid lifter cams.
The Ford system isn't like the early Chevys that refused to keep the adjustments for long. The Fords maybe need to be checked in the 30,000 mile range presuming that you did it right to begin with.
The Cleveland was never designed for a roller lifter cam. EVERYTHING is adapted to it. The quality of that depends on who designed the adaption and that was not Ford.