This is what have I have completed so far. The box is 3 cubic feet net tuned to 35 hertz. The port is 3" wide yielding 43.5 square inches of port which isn't a ton but should be enough to get some air flowing. He wants the sub mounted on the front so instead of having the front piece mounting between the top and bottom piece, I have decided to make it the entire height of the box so that the baffle isn't too skinny at the top and bottom.
Here are some pictures of my progress: