BMW: Car pulls even after alignment, sharp turn, steering rack

Question
On a 1988 325ic if i make a U-turn or hard turn the steering will continue to pull in that direction for anywhere between a few blocks or a few miles before correcting itself.

Answer
Max,
 Is the steering wheel returning to 12:00 position, and the car is pulling?  Or are you saying that the steering wont return to 12:00 after a sharp turn.

 Chances are that the alignment isn't at fault.  Its probably the steering rack getting seized up.  Have you checked/changed the fluid in the powersteering system?  

 I would do those things, then we'll go from there.

 Good Luck,
 Josh