That long curved steering arm that connects to the front end of the drag link can get bent, resulting in the steering getting way off center. I'd suggest making sure the steering gear is assembled properly, center the gear in its travel, and disconnect the front end of the drag link. Align the wheels in the straight ahead position and see how closely the end of the drag link and the steering arm lines up. If necessary, straighten or replace the steering arm.
Jerry
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"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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