How to Replace the Head gasket in my 91 s10 blazer with a 4.3L V6

The job you are attempting is a 5 wrench job on the 5 wrench scale. You need special tools, for instance a torque wrench. A head gasket job is expert level work, not for the beginner, but, I give you an "A" for willingness to attempt it. Take some pictures and send it to my email address. harts.auto.repair@gmail.com