Hi Carlos, I have a Kakadu and run 285/70/17 the same tyres as the Landcruiser, yes they are outside the guards but only just, don't see a problem with that though, I supplied these tyres during the build. There are photos of my set up on the forum. I will post this the shortly include the link so you can see.
http://myswag.org/forum/index.php?topic=7856.0
Hope this is of help to you