[philminotti]

If you need a little extra clearance for fancy rockers, I recommend the cork gaskets that DSC Motosports sells. They have several thicknesses. I use 3M weatherstripping adhesive to glue them to the cover and a light coating of wheel bearing grease on the head mating surface. I've had them on and off dozens of times and never a leak. Of course, the intake/head junction needs to be relatively flat...