[KTL]

Can you get a closer in-focus picture of the damage? It looks to me like the spray tube is gouged open. If so, that is the path of least resistance in the tube and most of the oil is gushing out at that point. That means the other tiny pinholes in the tube which spray the other cam lobes and valve springs are not getting good oil delivery. Also worth mentioning is the oil supply to the the larger holes that feed oil to the cam housing bores. These bores lube the cam "bearings" where the cam spins inside of the housing.

I personally would have a real hard time leaving that severely damaged tube. It would always be on my mind while driving the car. Especially when driving it at higher rpms like these engines are meant to be driven.

I have taken apart several of these cam housings, some of them being junk, and therefore I have some extra spray tubes. I'll gladly send you one to get this fixed up right.