These heads have never been ran ever before. They are fresh out of the box from Hughes engines with what looks like sharpie ink on the top of the valve stems. What that’s there for, I have no idea. I also have Hughes engines roller rockers, and they roll perfectly dead center on the valve stems. As Pittsburghracer mentioned, I’m not talking about a rocker shaft hold down bolt or stud. I am talking about the head stud that holds the head to the block. If you guys say the head stud won’t completely block or restrict the oil to the rockers to a point of negative affects on my pricey Hughes roller rockers, I’ll give it a shot and put it all together and see what the oil Flow looks like at the rockers when I prime the motor. If I get oil flow at the top that I’m happy with, then I will run with it. I’ll report back here with a video or at least a link to a YouTube video of the prime for everyone to see before I actually turn the key and get this thing burning fuel. I do feel better knowing there are people out there running small block LA engines in the same situation I am in right now.