I am going to build a box for an 89 camaro. The box is going to be ported, and will house two mtx 7500 12s. It will be upfiring in the rear hatch storage area.The box, according to the website that i found, is about 2.4 cubic feet. here is the link for the deminsions, http://thirdgen.org/techbb2/showthread.php?threadid=306257 . The only problem i have is tuning the port. i realy want the box to be ported and upfiring. So my question is what would i need to tune the port to to get the base to me in the drivers seat. Also, explain to me how to tune the port, the box will be divided into two seperate chambers so each chamber is about 1.2 cf. Any help would be greatly appreciated.