What does it take to be the perfect sand dune machine? The Dirt Heads have attempted to build sand machines before, but had less-than-stellar results. This time, it will be different. The guys start with a V8-powered Nissan Armada and go about removing (almost) a ton of weight to make it climb big dunes with ease.

Everyone knows that if you want to put 40-inch tires on a Toyota, you need to cut out the independent front suspension and put in a solid axle. But Fred Williams and Dave Chappelle have other plans. They want to see just what it takes to stuff massive tires on an IFS truck.