Used to have a box that was 2.5 cubes per side before subs were installed (it was divided) i had a round port 4in x 10 in. Long. Subs were fosgate punch 1412 (single 4 ohm 12 inch) they were in a trunk of a 84 pontiac grand prix. I now have 2 sundown sa12's in a mercury mountaineer, im looking for something close to the tuning of the grand prix. Thanks in advance.