I just attached my bed this weekend using the 2 5/16" tall blocks I purchased online. They did not raise the bed enough to clear the top of the shocks. I bought some Maple and cut new ones at 3". This will give me some trouble when I go to install the running boards which I don't own yet. I'll have to jump that bridge when I get to it. I noticed that some online companies sell mounting pads for each block as well as the rear sill. The site I bought from only sold pads for the rear sill so I cut some of my own. 51 chevy 3/4 ton
Martin