Is a sd or newer steering box better on ower trucks
 

Okay I'm doing a coil suspension on my ttb is there another steering box that would give sharper tighter steering and bolt in with minimum mosifications may not be feasible at all but just a thought

The limit on your steering are the stops on the knuckle and how far a u joint can deflect when in 4wd. From the factory it's about as good as it's gunna get.. That being said you can look at different pitman arms, a longer arm will allow more travel of the draglink...