Capn,
The vehicle in question is a Jeep CJ, the only place for the speakers is in the back. I'm fabbing a solid cover for the cargo section and will build the sub box in the front of it, right behind the seats. I was figuring to mount the subs (2x8") down low, the mids above them and the tweets next to the mids. In the dash will be 5-1/2 mids and tweets. In between the two sub boxes, I should have enough room to mount the two amps, crossovers, and changer. Won't take up too much of the very little cargo space, all nice and covered and secured for when the tops off.