Bad Pull to The Right

Are you talking about the pitman arm that is supposed to be bolted to the steering box? how the dickens can that happen?
did the nut fall off?
did the arm fall off?
did the steering box fall off?
did the Engine flip over?
did the frame break?
Check the upper control arm cam bolts to see if they have shifted.

For the clunk during braking, check the strut rod anchor points.