Something that may make your life easier, especially if you're doing this alone is a couple of alignment studs. Pick up a couple of soft bolts with the right threads, cut the hex head off, notch the top for a screwdriver, and break all of the sharp edges. These don't need to stick up much from the head, but they'll keep the headgasket in place and align the nead for you. To get them out, unscrew them with a long screwdriver and fish them out with a magnet.