This head needs the head gasket surface fly-cut. The rocker arm studs are still in this head. Big Noot dug out this fixture for panheads and shovelheads. It has a series of holes to displace the studs - and it bolts directly to a precision ground surface. He made it so you have a couple different ways to mount this to your mill bed. The head sits level, indicate with thin shims for ultimate precision. The fixture also swivels to allow seat cutting if necessary. Saves a lot of time.