I also bought one from them, when it came in I checked the valve shim clearences and everything was within spec (although some were near the high end). But while doing this I noticed that the CPS gear on the exhaust cam had some chipped teeth (if I had run it this way it would have wreaked havoc in my expensive rebuild). I pulled the exhaust cam off of my old head and had to reshim it, it ran great until I melted a piston.