I like the flaming river box. I ended up with 3 turns lock to lock. Since I started with manual steering the swap from the original steering box to the Flaming River box was straight forward. I love the feel of the "tight" box out on the highway. I really didn't notice much change in effort turning with the car standing still, but I am still rocking the stock (bus sized) steering wheel.
Two small things to consider is the increased weight from the iron box and some slight header interference from the thicker casting on one tube.
Best price I found was at Speedway Motors, but I am sure Summit Racing or Jegs would be willing to price match.