New axle.

I would wait to set opinion angle until I had it everything installed with the wheels on ground and suspension loaded as the Mopar Chasis Guide suggests, but that's just me. I believe it shows -3 to -5 degrees combined for your application. Combined is probably not the right term, but adding the pinion angle to the driveshaft angle.

Well, never mind, brian6pac posted the procedure while I was typing my reply. Thank you brian6pac as I'm on my cell and didn't have access to the procedure.