Im starting to look into getting a new truck. Not sure if I will go with the new style or the classic but I know I want an extended cab short box 4x4. The only option Im having trouble with is the engine. I dont want the 4.8 but Im stuck between the 5.3, 6.0, and vortec max 6.0. Which is going to be the best in terms of aftermarket availability and which will be the easiest and cheapest to turn into a potent monster. I would like to be able to put down atleast 425 hp to the ground.