I have tried this thing called GOOGLE dude. I freaking know that the D44 is the most common axle to use, usually out of a Wagoneer cause it is nearly the same width as the rear, only a half inch shorter, I believe. Try freaking reading what I asked for - someone who has done one, or knows someone who does. Have you/do you? If not, then you've got nothing for me. If you have/do, I am guessing you are not going to give me any advice anyway. I am wanting advice on the actual planning, etc., cause this will be my first attempt at a SAS.