I've got 31" wide, 16" high, and 19" deep to work with. I want it tuned to 32 htz. For 2 12" Type Rs. I'll paypal you a few bucks if the designs worth it.
mmmmmmmm if you made a box for the measurements you gave us that would be 5.4cf not 3cf.
so figure a big port and you have 5cf fr each sub, make the port about 14.5inch high and 6 nches wide by about 13 inches long and you should be good to go. (ill have to figure out the exact port dimensions for ya but htats a ruff idea)
but you could just try them out in 3ft^3 and if you don't like it make another box //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif