Oiling issues

I am in need of some knowledgeable advice. Once again I have been plagued with engine issues. This is a fairly new race engine. Never been raced. Only broke in and ran a few other times. I am having an issue with getting oil up to the passenger side rockers. All of the push rod tips at the rockers are dry and blue . Driver side is fine plenty of oil. I am at a loss. Any insight to what the hell might be going on would be greatly appreciated. Thanks in advance
Rocker shaft was installed 180 degrees out.
I believe that they only install in one position and can be applied wrong shutting off the oil to the rockers.
Check the markings on the ends of the shaft and compare them to the side that is functioning properly.