A general rule we have for SAS..the information is on this forum (in old threads...you can search) and you need to do the reading yourself. I could potentially tell you a lot of what is needed but there is lots of diff variations.
Also, not to detract from ranger-forums.comm but since you have an older ranger, you would find better information on therangerstation.com. This site tends to focus on 93+ rangers quite often more.
Everyone wants to do an SAS, but very few actually do it. Once you have researched some other people's paths, you can come back and go "Okay so I see that blah blah is common...what specific year do I need to look for?" or questions like that.