Thats the stock shackle, thats all I know for sure. Doesn't look like the stock springs, but don't look to have much arch for any big lift. Don't know of any leveling with rear blocks. Just bought a leveling kit and look at a whole lot. Didn't see any woth rear blocks. The front springs front front hanger bracket, is it stock? Leveling kits are 50/50 bracket lift or spring. From my looking around I noticed all the lifts 4" and up are all spring and block. I could be wrong though.