Its called Potato ridge. Basically you will end up on the Pahrump side of the mountain on I-160. I did it numerous times in my 88 GMC with only 33X12. All you really need is 4wd and not care a lot about your paint. If I remember correctly there were a lot of bushes and branches rubbing on the truck.
But than again last time I did it was probably 4 or 5 years ago.
If the bushes are not too bad I might be interested in taking my Titan through there.
http://www.southwestoffroad.com/?cat=107