You can't do a 2" body lift this way. To do a 2" body lift, you need to buy a kit from RRO, Sky or BDS.
The way that body lift works is you bolt the 3" blocks to the frame, and the top of the block becomes the new mounting point for the body, the body has studs, not removable bolts. 2" blocks do not give enough room to support the length of the studs.
The 2" kits you buy include UHMW blocks, and 2" long sleave nuts, it's basically a steel sleave with a nut welded to the end and it's threaded all the way through.