4-12" L7 Enclosure??

I checked Kicker's website and they have some very detailed descriptions for building enclosures but the more i think about it, that trunk is pretty big so i'm not gonna worry about making the box by a mathematical equation. If i give those subs enough "breathing room", they're gonna pound. The site recommended using "Titebond" wood glue to bond the joints.....has anyone used this glue or had luck w/ another brand to glue the joints with? I've never glued joints in a box before. I normally just pre-drill and countersink holes and use coarse thread wood screws and seal it inside and out. I'll be using 3/4" MDF. Any input would be appreciated.

Yea, I'm gonna run some braces inside the box for sure. As for the subs being "underpowered"... he bought a HiFonics 2600w Brutus Super Class D Monoblock Amp to run all 4 L7s. I figured 2-500w or 1000w Class D monos would've done better but i couldn't say for sure. I'm not the smartest guy in the world when it comes to speaker systems which is exactly why i ask so many questions on here.