Well that’s kinda where we are at and discussing. Have a friend that mentioned exactly the same thing micrometer as he and his dad built a couple bikes when he was growing up. But as i researched about the numbers not matching and discussed with his dad. Came to the conclusion that it might be better to get another head than repair this one. Something about where the cam lays on, It’s hard to match with a different cover as It wouldnt hold the cam in place correctly. On top of everything I mentioned, also found helicoils on the two bolt holes that come up from the cylinder to hold the head. Having him take it to the machine shop anyway to see what they suggest.