Got my axle back, got my 4in lift on, my sye installed and my new tires on. Now I have a few questions. Where are you guys measuring from to make sure your axles are centered left and right? I put adjustable upper control arms on my rear and fixed on the bottom rear, where should I measure to make sure the top are squared from front to back. Also I'm getting ready to order a driveshaft, but I want to make sure I get the right length, where should I measure that from. I eyeballed my pinion angle, any idea if it's close, at least close enough to get a accurate measure for my driveshaft length?