If the center point of the steering gear doesn't align with the straight ahead position of the wheels, there's no adjustment to correct it. Wear in various parts of the steering linkage (the drag link pivot balls in particular) can only be corrected by replacing parts, since the drag link isn't adjustable for length. Some people solve the problem by fabricating a drag link from two tie rod ends with a turnbuckle sleeve between them. Find the correct center point of the steering gear, lock the steering wheel into place, and adjust the drag link to point the wheels straight. The steering wheel can then be positioned properly by moving it a spline at a time until the spokes are centered. If there's a major centering error, like a turn or more of the steering wheel, it's possible the steering gear has been assembled incorrectly or something in the linkage is bent badly.
Jerry
