I am making a box for the back of my Lincoln Mark VIII. I have not measured the trunk so I dont know the dimensions the box can be. Ill do that tomarrow. I have a single Brahma 12" that I am putting in the car. I want the box ported but I have no idea how to make a ported box. I hear its not as easy as building the box and putting a hole in it but I dont know. I figure the way to build it would be like this. And the inside will be like this. I'm not sure about the demensions of the box yet. I also need a suggestion on the size of the box. How much room should I have in there. (not huge) I have about half the back of my trunk I want to use and I am going to be running it off a crossfire 1000d.