The Boatside Bomber rockers from Off Road Evolution allow more clearance under the rocker guard, and the instructions show you how to move the front fenders and cut the hood for more clearance. Out back, you can trim almost 2 inches out of the wheelwell for more clearance. And, for the space it gives you, they are cheap. The Bombers are $519.99 with no slider or $599.99 with a slider (both raw steel). With some adjustable control arms and bumpstop extensions you could probably squeak 40s under there.