I have a 4130# street weight '00 T/A. I have stock springs in the back and lt1 springs in the front due to my iron block. I have found that unlike most, my shocks like to be about in the middle of both rebound and compression adjustments. Dunno why but the ride is MUCH smoother and not so harsh over bumps. The firmer compression (bottom adjustment) has made the most difference in ride smoothness for me. Just a FYI for those who might search for others adjustments with these shocks.