[Wbulk]

10-15 deg. ! That may be a problem. Even with adjustable ends your upper arms may not line up with the mounting points. As you rotate the axle the upper arms swing in an arch. The further off the angle is the further the upper arms move out of alignment with the mounting points. Think about it. You may need to add heim joints on one end. I would put it up on jack stands and disconnect one side of the upper arms. Calculate what the pinion angle should be and put a jack under the axle nose and rotate it down where it needs to be. Then take a look at where your upper arms align.

Wayne