I bought a 2012 f150 crew cab from an equipment rental company. This was a salesman's truck. It rides really rough on my opinion. It sits higher up than identical trucks. I recently installed a leveling kit to level it out and later decided that I should install new shocks before having it aligned. While hunting for shocks I discovered there are several options. Standard shocks, heavy duty shocks, shocks for trucks with heavy duty suspension. Anyone know how to identify what I may have? Thanks in advance