I just lowered the rear on my 92 D150 last week. I used to have it sitting high for towing but in the last year I`ve taken out the air shocks and add a leafs and added B Body Ranchos and traction bars because I race it occasionally. I just added longer shackles and it lowered the rear 1 1/2 to 2 inches. Now the truck sits level and looks better,its not actually lowered but its level.