If you're going the route with buying a reman box, make sure you get the right one. The quick ratio steering boxes aren't always the same. The input shaft can vary, that's the obvious part, but other than that, they can vary in the internal stops. Most of the F-body boxes had a longer pitman arm which was adressed with a smaller steering angle of the box. Smaller angle compared with a longer arm resulted approx. in the same turning radius like a bigger angle and a shorter pitman arm.
So, some boxes will have different internal stops, which can result in a quick steering ratio, but a bigger turning radius of your goat than with your stock unit.