it has to be a YJ kit if its leaf springs. The TJ and JK have coils
I talked to a buddy of mine and he is sure that rough country had a 4.5 inch kit which had terrible sagging problems. not too sure about the size of the smaller kit offered at the same time.
1987 YJ, 4.2L I6, Weber carb, 4in. RC lift, 33x12.5x15 BFG KM2's, 15x8 Cragar soft 8's, custom steering box skid, and more