In summary, I just filled the open spaces where the steering box mounts were. I made patterns out of thin cardboard and traced onto the steel plate stock. When you look at a K member stripped down like this, you can see where there is room for improvement. They were probably never designed to last 40 years though! The bigger sway bars, larger brakes, wider tires ALL put additional stresses on the K member and frame rails. I'm anxious to get this installed and tested!