sa-15s chevy truck help

[shithawk 10+ year member]

I currently have an sa 15, and i plan on running another in my truck (92 extended cab silverado) but i have been hearing that i will not have enough airspace without walling it off. The space i have to work with is about 62" wide, and 26" from the back of the seat to the back wall of the truck, and i would like to stay below window line, i could live with being a few inches above and would be about 30" tall. So my question is, without a wall or something similar in height, do i have enough space to work with 2 sa15s? I am not good at designing/building boxes, but i know a few good people so i would just give them the space i have to work with and tuning etc, also i will be powering them with an orion xtr 2400 @ 2 ohms. Any help would be appreciated, because i am kind of wondering where i should go with my substage.

edit: now that i think about it, this should probably be in the subwoofer section. sorry about that

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[ThatChevyGuy 5,000+ posts]

Checkout the12volt.com they have volume calc's and port calcs

 

[05fronty 5,000+ posts]

i had two in the back of my frontier and it wasn't a wall