if you want durabilty buy a deisel, cummins (doge) or duramax(chevy) , i would stay away from powerstroke (ford), deisel engines last for a very long time, and as far as torque and power go gasoline engines cant come close. If you use a chip on a deisel engine (if you can screw in a light bulb you can do that) your numbers will be extremley high and you will run at maximum efficieny but they are expensive...

also if you buy a ford or chevy you will never have to look for a part, all so easy to find