replaced everything....

Next time you get an alignment, mark the upper control arm bolts and washers so that the next time it goes out, you can see if things are shifting around in this area. Do the same thing with the tie rod adjustment sleeve.

Check to make sure the ball joint in the UCA is in straight and is not backing out of the hole. You also may want to check the joint in the pitman arm to make sure it isn't wobbling around. Check to make sure steering box is bolted in tightly.