i have an idea for a custom subbox to go in a 98 z28. it will go above the back seats and take up all the room from the top of the back seats to the headliner so that everything is flush. it sounds like a good idea to me and would minimize rattling. let me know if youve done this idea or have seen it or whatever i need some input. oh and i plan to put 2 12in kicker comp vr's in the box and most likely port it.