Box design advice for three 10s?

Attachment 26539316I posted earlier but decided to repost, i'm designing a box for three 10s in the trunk of my 97 Nissan maxima, but I have a design in mind, tell me if you guys think im good or at keast on the right path.
I used RE Audio's box calculator, and want the subs firing up and port firing back to the trunk.
Since the picture *****, here are the dimensions (that I plugged into the site, not how i'd build it):
Width: 12"
Height: 35"
Depth: 20"
Port Width: .875"
No L-Port so no second board.
Says it's 3.616cu. ft and tuned at 30.4Hz.
Would this work? Or does it need some editing?

Why do you pick subs up instead of back in the trunk?

Quote:

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Originally Posted by mazdakid

Why do you pick subs up instead of back in the trunk?

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or forward.

That port is waaaayyyy too thin if I see that right.

---------- Post added at 08:09 PM ---------- Previous post was at 08:08 PM ----------

Yes, I see your specs now, that is terribly thin.

well to mazda and ranger, i wish i could design it to have everything fire backwards, but i can't seem to design it right. so i chose subs up as my next option. any ideas or designs you could throw my way? cause i can build it, i just can't figure out the design... :[