had a similar prob.. my path, has to carry a small cabinet{whole with of back} a large plastic bin, and other vet equipment in the back. Soooo, I stuck my amp under the right front seat, plan to stick the other amp under the left{maybe this weekend} and the sub is a small box with a 12 " kenwood in the back next to big bin and behind the cabinet. You can also try mounting the amps from a custom interior roof rack.