Need help with a box desigen for 2 sundown x15

[Frosty1290]

I really need some help with a box desigen or cut sheet for my first big build.  Im going to be running 2 sundown x 15s on 2 hifonics 3000 watt mono amps.  I have 2 95ah batterys in the back both xs power and 1/0 gauge wireing. Also i have a battery isolater and 1/0 big 3 upgrade.   I really want to do subs forward port forward in my 06 chevy uplander.  

[MyNameIsNoob]

I jus did a post w the exact same equipment a cpl days ago. Check it out, got some good info on there