[dsraven]

When you do measurements try to be precise. Measuring by eye to the ecntre of a shock bolt, for instance, may not be as pre ise as you think. Remember the shock mount hole in the frame is quite a bit larger diameter than the shock bolt and there is a rubber bushing to insulate and take up the slack. That means the bolt that you may be referencing may not be in the centre of the hole.
Just a thought, but while the clip is apart for rebuild, a straight edge could be placed between the shock mount holes and a mark made,the same on each side, for reference upon assembly to the truck frame. Inaccurate reference marks may place the new clip off parallel to the old truck frame.