8) open up the port openings to allow for porting. what you might do is take a couple of gaskets and cut one up, fit the individual pieces to the head. hold them in place with something like scotch tape once have them where you want them. then take a piece of sheet metal or cardboard or even masonite cut to the right size, and using an adhesive of some sort, press the material against the gaskets and wait for what ever adhesive you used to set up, then pull the template from the head.
another way to get an initial template is to get some gasket material from say autozone, tape that up to the head, and using a small ball peen hammer, you want to use the ball peen side, tap the gasket material at the edges, and cut the material at the crease you make. that will give you a better template than the stock gasket. again remember to open the port openings up some to allow for porting.