So I have been looking for good shocks that can handle rough dirt roads better than stock. I have recently discovered that the shocks I wanted were for the shorter wheelbase. I have a 13 el xlt. I didn't think there was a difference between the two but apparently there is. So what do you all recommend? Stock isn't good enough and I've already tried the bilstein 4600, they gave out at about 20,000 miles of use. I'd also like to know why the two wheelbases have different options?