How do you fix a blown head gasket for a 1988 dodge ram 50 pickup?

The head must be removed and resurfaced. A blown headgasket is, for all practical purposes, ALWAYS the result of a warped head. A machine shop can resurface the head then a new headgasket can be used when the head is replaced. Unfortunately there are plenty of other pieces that must be removed/replaced as a part of the process. If you want to do it yourself you might want to have an experienced helper to show you how.