I was thinking it wasn't too big of a deal, but know that it wouldn't hurt to try and center it If I can. And wouldnt shimming the shaft move the pattern further out anyways?
Yes. Adding shims will move the wipe pattern toward the exhaust side of the valve. Installing valve stem shims or milling the pedestals lower will move the pattern toward the intake.
I had this issue when I built my 340 with CC rockers (Pic 1). Mocked up 3 different sets of factory heads and they all were to close to the edge for me. I chose to not run valve stem spacers and gave up on the comp rockers. I talked to Mike at MRL and explained my issue and he recommended I put a set of Hughes rockers on. I bought them from Mike and the geometry was perfect (Pic 2).
