First, get the front wheels straight, back to the end of a straight road or drive, then pull forwards lining up something in the distance. Don't look at the steering wheel! Then get out and unhook the pitman arm at the linkage. Turn the wheel to the far left, then right, then half the amount to center. You should feel a slight drag when crossing center in the gear box. Don't center the spokes of the wheel, center the box! 1/2 of the turns lock to lock! If the steering wheel is centered on the shaft, great, if not center it. Use your seat belts to tie it in place once happy with the position, don't let it turn. Now get out and check the alignment of the linkage, the ball joint should slip right into the socket. If its off, the tierods need adjusted to get it centered, most pitman arms are keyed, they won't just move a few teeth! Like I said above, the tierods can be adjusted off center but still be in spec. Joe