Put the valve cover on a fresh engine rebuilt this weekend and after tightening down the heads bolts (not torquing) I noticed the right side intake rocker would no longer freely move (though I could still turn the engine over). I pulled the valve cover off and after greater inspection noticed this raised area on the head. There is not a corresponding area on the valve cover that matches up with this. It almost looks like a washer is on there, but it's not, it's machined into the head. I think what is happening is that when I tighten down the valve cover, that the mismatch is causing the head to warp which is stoping the rocker arm from moving. I got this motor as a basket case, so it's possible these are not matching heads/valve covers. Anyone see this before, or know what year this head is from based on this raised area around the bolt hole?
Thanks in advance!
Thanks in advance!