Firm Feel Steering Box

Search around, you can modify the stock pressure regulator valve to reduce the "free wheel" action of the stock boxes.
Uhh, yeah but this does not address the slop or any leaks it might have. The reduction in boost pressure can be tricky. I have found it to be really hard to get it right where I like it. When I got the boost low enough to improve the feel, the steering was notchy if the idle dropped a bit. If I removed even a slight amount of washer thickness, the boost jumped up and it didn't feel much better than before I started. For a very low $$$ trick, it is worth a try though.
The Firm Feel rebuild involves stiffer internal springs that work the same at all conditions.