Need help designing ported double cab box!!

Has anyone built a ported dc box? I would like to do two 8s or one 10 but i havent seen many ported boxes for the double cab at all and no im not going to buy the ********* single 12 ported box for $600 thats rediculous and id like to be tuned to around 30-32hz i am planning on using two sundown sa-8s or ascendant audio 10" assasin somewhere along those lines! I would settle for four 8s sealed but i want to hit as low as possible and unless i could fit a sealed 15 back there thats not really possible! Any info would be appreciated!!

 

Pretty much what i figured.......its like chasing bigfoot

 

Hold on let me find it...

 

http://www.tacomaworld.com/forum/audio-video/234155-under-seat-subwoofer-club-ussc.html
Boom

 

Yeah ive seen that thread before good lookin out! I just dont like the idea of totally cutting up my truck and glassin it all done.....and i wanted it behind the seat but i just might attempt under the seat.......hmmm

 

I have a Alpine Type R 12 behind the rear seats in a sealed box but I could make it larger and port without issues. I can fold the seats down and leave the plastics on the backs as well. It can be done, but I had to make 3 different boxes to get it right (I am not a wood worker in any way/shape/or form).

Check my build link for some pic's, it will give you ideas.. You will want to cut some sort of c-notch into the box as well.