Installed Rebuilt Steering Box and Still Have Play

Still have excessive play in a recently Rebuilt gearbox. All linkage and King pins are new in the last few years. I believe I centered the shaft correctly,but on the highway there is just too much play. I wonder if only seals were replaced and that's it. I would have thought it would be tight at first and then loosen up but it was loose from the get go. Is there a good way to adjust out some play ? Thanks in advance.

looking thru the grill there is a 1/2 "or 9/16 nut with a threded screw in the center , let me know if you need direction.

this should point you in the right direction

https://www.bing.com/videos/search?q=1958+dodge++steering+box+adjustment&ru=%2fvideos%2fsearch%3fq%3d1958%2520dodge%2520%2520steering%2520box%2520adjustment%26qs%3dn%26form%3dQBVR%26sp%3d-1%26pq%3d1958%2520dodge%2520steering%2520box%2520adjustment%26sc%3d0-34%26sk%3d%26cvid%3d06CCA2FDE93B42689E1B5B146AAA7DDE&view=detail&mid=86CF9AC4C403D40BE24286CF9AC4C403D40BE242&&FORM=VDRVRV

Thanks Dix, After I raise the front end and center the steering wheel .Does the Pitman arm or Drag Link have to be Disconnected from Box ?

I made the adjustment a few times and it's Better. Still has Too much play for a fresh rebuild. Maybe a steering stabilizer is in order ?

maybe a alignment shop could point in the right direction,