i allready run a 2" bodylift and 33's. fender contact allaround. so, first comes the SYE. i want to get the JB conversions super short sye, because it allowes for a 2,25" longer drive shaft. NO rear trackbar, you suggest removing the front as well? so, as i understand there is an actual difference between the 4" and 4,5" rubi springs? i thought the diference had to do with shackles. if there is a diference, the 4.5" ones will be stiffer?