We need an old-timer (Old fart?) to figure this one out. I know that '68 HO's came with the internal plates as mine has, and I assume they are for the "drip oil" angle we have talked about. Maybe not. The pattern makes sense but I don't know, maybe they are there to keep parts from taking your eye out when the engine blows!! But I have seen the newer valve covers advertise they "drip" correctly for an FGF.