Well I have been hunting around looking at rear shocks that will accommodate just a 2" block kit and have gotten a bit confused. I came across were it was talking about EB1, EB2, S1, S50, BP7 BP8 and BP18 mounting codes. Since I have never bought shocks online I am not sure which ones to get. 2008 chevy silvy x-cab z71 18" stockers. The whole mounting codes thing has thrown me for a loop. Just not sure which ones I have. Appreciate the help?