need help with building box in trunk

[armyranger3858 0]

have an 18" aa havoc and it's going into a 98 pontiac bonneville....want to build a ported box inside the trunk but i don't really know where to begin....the box has to be 6.0 cubic feet after displacement and tuned between 28-30 hz. thanks

[armyranger3858 0]

thinking about using two 6" aeros to save room....help please

[emh9009 199]

measurements of trunk? what kind of ports do you want? any more info?