What I would do to get all your answers in one swoop, contact Crutchfields Tech Support, they have helped me out in the past, they have alot knowledge and have access to a wide range or resources. They also have a subwoofer fitment guide, for a KC I assume you don't have much space, I actually have a CC so I have a little bit more working room. I would recommend a downfiring enclosure. You can tell if your amp is mono if there is only one set of input out terminals. A mono block will work great with two 2 ohm subs. But give crutchfield a quick call and see what they can tell you, won't hurt any.