My spray bar covers have a T fitting in the center for the oil line entrance and two lines off of it to the ends to spray the rockers .
A .024 (#73 ?) drill bit will not fit into the holes but a .0225 (#74 ?) will fit
The T fitting has a restrictor in it but I haven't check the size of it yet
I haven't race the new motor yet with those covers on but I will try to have them ready for the next race in two weeks, they need baffles welded in and maybe welding up one of the breather holes also if the bolt in cap kit I have won't work
IHTHs