[larrys40]

There are a lot of things that can cause tight steering. If you've redone the box and it is smooth on the bench.... then hopefully that is out of the equation. As Mitch stated 35PSI should be good... and yes you have to gauge steering when moving.
Other items include:
1. steering balls and end plugs... I Highly recommend the steer-eze kit adjusted properly
2. as Mitch stated the spindle bolt load ( must be properly loaded and shimmed if necessary - can have a great impact
3. proper toe in - please make sure it's checked with an accurate tool. There's lots of inaccurate methods touted but I would use an accurate toe in gauge or take it to someone who can accurately check it. You would be surprised how much difference this can make.
4. make sure your front spring isn't sagging which if severe can cause the drag link and tie rod to rub. Many original units have evidence of this.

5. proper lubrication on all components including spindles. The spindle bolt loading and bearings are key here. with the car down if you can rotate the spindle bolt bearings it is not riding on them.

Check all the above and hopefully you will find something to fix and improve upon.
Keep us posted!! Maybe post a pic or two of your front end.

Larry Shepard