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You can take some of that play out by replacing the worm and sector on the seven tooth box but it will never be equal to that of a two tooth.
The best I have been able to do on a 7 tooth is get the play to about 2 inches. I have done several 2 tooth boxes and could always get them to zero play at the center position.
There are 2 tooth '29 boxes out there but hard to find. They have the splined steering wheel shaft and the open segment area for the control levers.
I have converted 7 tooth boxes to 2 tooth but it is a considerable amount of work.
And I have installed the F150 box in a few cars but I prefer to keep it as original as possible. A well restored 2 tooth box and steering assembly will approach that of the F150 for ease of steering. The main difference I have seen between the two is the F150 seems to return to straight forward after a turn better than the 2 tooth.