First thing that you need to do when preforming the task of head gasket replacement is to make sure that you have the proper tools for the job.
The next step is removing the old gasket from the cylinder. I think the motor company makes a special head gasket puller, but I find that a saw is much more efficient.
You may need to consult your local chop expert if you are unsure about this next step. Place a new gasket on top of the cylinder and make sure it is nice and secure.
Put the head and rocker box back on the big and check for proper fitment. Glue may be needed for this procedure.
After you have completed the task of head gasket replacement, you have received 20 chopper cred points. Sit back, have a beer, and celebrate.