You're the one with the problem with people...look back to the beginning of this thread to see where it went off topic....and think about how you advertise parts, and how many people know each other on here and maybe you'll grasp it. You advertised the heads with the CC #. You was asked if they were CC'd, and when it come to it, you was going off what someone "told" you. The heads have been decked before, which means they are no longer at the "as cast" CC # (smaller chambers) miss matched valves, no shims under any of the springs but they are good to .650 (again "someone" told you)....but checked they were checked out by machine shop. Magnafluxed doesnt give heads a "clean bill of health" BTW when new valves are installed, a valve job should be done or at a minimum "lapped" in.
I dont know everything, but been around this stuff long enough and so has many others here