18 BL in my reg cab f 150

[mld4.2 0]

This is the graph i got from WinISD

volume is 5.4

port is 4* 8 * 11

(dont know if thats the right port size or not. I would like it tuned around 32Hz)

http://i235.photobucket.com/albums/ee29/mld42/FiBL.jpg

This is a very rough sketch of the box to show where the ports could go. The sub with be mounted inverted for more box volume.

I have 2 12's now in a sealed box, but would like something louder, and I have a BL 18 dual 2 that im not using so I am trying to fit it in my truck.

http://i235.photobucket.com/albums/ee29/mld42/Blbox.jpg

And is there any way to extend the port out of the box rather than porting the inside. I havnt seen this done so I dont know if it will work, but I need all the volume I can get.

Something like this

http://i235.photobucket.com/albums/ee29/mld42/Blbox2.jpg

Let me know your thoughts