Hey guys I have a 8.5 GN axle, but is not posi, I bought another 8.5 axle from a camaro with posi and 4:10 gears, I want to swap the posi and gears over to the GN axle. I was planning on having a shop do it but money is tight, and would like to do it myself, im the kind that likes to do it myself if isnt too hard. Would i need to get all the special dials and such to install it? Should I let a shop do it? All I want to do is swap internals, both axle are the same spline, posi is in great condition. What do I need if I want to do it myself?