Rocker Arm Oiling

The reduced shank rear bolt started when they went to the peanut plug head. (Around the '75 model year) If your head does not require one and you have one, it will not tighten up at all.

Do you have oil out of the rear hole with the bolt out and the engine running? If the rear cam bearing is not aligned properly you will have no oil no matter how clear the passage is.

I have a set of RAS rebuilts on my motor and they will oil like crazy.