Plans for 2 10" Box for Back of S10

I was wondering if anyone has made a custom box for the extended cab part of an S10, and If they have, would they mind posting them. With my current box I cannot use the seats in the back, and it would be helpful sometimes to be able to use them. I have two Kicker Comp VR's, and a 500Watt Xplod amp. And also, what is the "ideal" volume for a box for my two subs, and how exactly do you "tune" the box.

Thanks

For 10" CVR's, suggested sealed box volume is .8 to 3 cu. ft. per speaker (very large range). Ported box sug. vol. is 1.25 to 1.75 cu ft per speaker. U can check out www.qlogic.ws to find the specs on tuning if u plan to use a ported box.