most importantly, though, your GMC weighs about 4000 lbs, has a high roll center, and the 44" inch tires are not an advantage at all. The weight alone will get you smoked by this FRENCH car - i highlight that because it means it's not a r-i-c-e (once again the page won't let me spell that word normally) burner...aren't they japanese?...-, but add to it the fact that having larger wheel/tire diameter will kill your acceleration and you have the recipe for getting ripped apart by any WRC car. Your much increased ride height would also make your monster roll off a cliff if you tried to corner at the speeds that these cars do, and your horsepower advantage is negated by the afformentioned loss of acceleration. You might have higher top speed (emphasize "might" since these things can average 120 mph on a gravel rally stage), but it will take you a hell of a lot longer to get there. I hope by now you're starting to see my point so that i don't have to go into braking distances, active suspension technology, and tire patterns...I'm sure your truck is an awesome off-roader, but it's not even in the same world as this thing.