you can also get these type of energy suspension bumpstops and they bolt right in, no need to shim or any of that.
They are a little over an inch shorter than stock, plus you dont reuse the stock metal shim plate which gets you about another 3/8" so you gain about 1.5" of suspension travel.
http://ftw.truckmoxie.com/showownerp...-4-album-19068
pic in there, and the PN for those bumpstops is in the descriptoin
if thats still not enough (although it shoudl be....or you really need a c-notch), a hacksaw will cut the next snubber levels off in like 10 seconds for another 1/4" each step, just be sure to leave it hang down past the frame rail at least 1/4" so your axle wont hit it.
