Where can I get the proper order of removal of parts to remove the head? on 1990 Isuzu Trooper

Need to replace head gasket, timing belt, and several of the exhaust valves, I will get the head and valve portion done by the machine shop, so it is done properly, but need to find out how to properly remove the attachments above the head. Also what is the best way to mark or map it so that all goes back together correctly? Can anyone help gude me?
Thank you.

Asked by for the 1990 Isuzu Trooper