How to stiffen the steering up

I screwed up some years ago when I replaced my steering box with a rebuilt unit from advance. I exchanged my units and forgot to get a little restrictor that was in the supply line between the pump and box. I didn't have any idea how big the hole was in the restrictor so i experimented and on my 3rd attempt hit it right on. now my car has "road feel" - and not too hard nor too soft to turn
More caster makes the steering wheel return better when you turn and track better going down the road too