OK, here is the only real part of my Jeep I don't really understand. I understand how important it is to set timing, but I don't understand (1)vacuum advance and how to check it. (2)Also, how can you tell if you need to replace your points? (3)Oh, and what are points? May seem like something simple, and frankly I am quite surprised I've never looked this up before! (Might expleain why my 304 ran like crap!!!)

(4)Also, what all should you be looking for when setting your timing? I have seen people pulling vacuum lines, etc while doing a complete tune up, but which lines were they pulling?

One last question. (5)What does the ignition control module actually due on my factory Motorcraft ignition system in my CJ?

I know this is gonna take a lot of typing, but if anyone has a few minutes to help explain some of these basics to me, it would be greatly appreciated!!

Jack