I have 1965 Buick riviera and I would like to know if buiding a chamber around my sealed box for my 2 12w3v2's and porting it through the original single 6x9 hole in between the rear seats, will give me good sound in the car. The speakers will be facing foward firing into another box basically that tunnels into that 6x9 hole, which is raised up and further back about 12 inches so I cant put the box directly behind the seats. I'm going to try to isolatate the bass completely from the truck as much as I can with the second chamber/box. Does this sound like it will work? I tried all other methods facing rear, up, and the bass seems to get lost in the trunk. I do not want to cut any holes in my rear deck lid as I want keep everthing original looking. This should also cut down on my trunk vibration as the cabin is now pressurized instead of the trunk. (my opinion). The box is built to JL's specs, 2.5 cubic feet, and internally braced. The box is 46wx16hx6d(top)12d(bottom). I'm also going to use some dynamat as this should help with vibrations.