You will get lots of advice on truck capabilities, suspension mods, etc. but you should really look at the physical dimensions of the truck camper you are interested in. Your truck is fine but with an AF 1140 on it you will be at least 12'6" tall and almost 8' across. Traveling through Kentucky/Tenn this summer I discovered some roads barely accommodate my width. It forces you to spend a great deal of concentration on your position on the road...especially if there is oncoming traffic. These are physically big campers, fortunately most places I have gone in the states allow me to get in and out without much difficulty. I don't know anything about Mexico and central american roads, etc but you aren't gonna have fun if you can't pass oncoming traffic or get down some roads without worrying about losing parts of your camper. I have read several trip reports about people traveling that part of the world who use pop up truck campers. You live there so you probably will know if a physically large camper is reasonable there or not.
