Some help needed about steering box.   I’m working on a recently acquired a 1932 Buick 50 Series sedan.     There is excessive play in the steering.  I have made the adjustments per the service manual on the roller shaft and worm shaft end play but it had no impact on the amount of play.  There is also mentioned that “backlash between the worm and sector is adjusted by shifting the housing cover” page 109-110.    I made this adjustment and was able to eliminate some of the back lash but need to