Get a set of new head studs. Lop the head off two old ones and, grind a bit of a chamfer around the top, then grind a slot in the top for a screw driver. When you are ready to refit the head, screw these modified studs loosely into the block. These help hold the head gasket and guide the head into position. It is then easy to un screw them. A bit of extra work but it will save you crimping the new gasket.