The best way to locate the mounting tab correctly is to attach it to the box (as shown in the proceeding photo) and mount the new box to the framerail using the mounting bolts and spacers through the holes in the frame. Once the box is attached to the frame, the through-the-frame mounting bolts will hold it in place so it can be tack welded. Once it's been tacked, remove the box and finish-weld the tab in place. You also may have noticed that the inner fender panel had to be notched to allow clearance for the steering box mounting tab. Well, that's not the only trimming needed when it comes to that inner panel. Since the new power steering box is mounted outboard of the frame, the new intermediate steering shaft crosses over the top of the framerail and into the engine compartment.