Exactly where mine cracked, and where I purchased my new one. I got the HD valve springs and stainless undercut stem valves while I was at it. Randy is a great guy, extremely knowledgeable about these engines, and has really good prices too. One thing to note, I had to find an old stock Melling cam on E-bay for my new head. My cam was a bit scored and I wanted to replace it. All of the cams I could find at the parts suppliers were .020" over on the bearings. The new heads are bored for a stock diameter cam.