I have decided to go with a Rancho 4" lift and 35" Toyo M/T's. I know from experience how these kits ride (on a Chev HD) and it will raise the belly of the truck up and out of the mud and ruts...
I will post a pic when all the parts are in and installed.
What site are you going to? I know that the East Athabasca Highway out to Kearl/Husky/Firebag can get pretty bad after the rain we've had up here. Our F350 15pass shuttle van was tail happy the entire way I love getting on paved roads now and not having to listen to these work trucks shake themselves apart.