I agree with the previous post. Get an alignment. After installing the lift, your first stop should be the alignment shop.
If your DW doesn't go away after that, start looking at other things, have your tires balanced & rotated, check trac bar bushings, compare the angle of the trac bar to the draglink, they should be parallel to each other for proper steering geometry. Do not replace your steering stabilizer to cure your DW. This is NOT a cause of it, and replacing it will only hide it for so long. If all your front end is good, tight, & properly aligned; your steering stabilizer would not really be necessary.