rules on trunk are everything has to be in the trunk. subs box, amps, batts. no modifications to anything forward the b pillar an if your back seat don't fold down you can remove it but an i say this but it has to be in the car laying on seats to show that you have it.
basscort seeing that your modding your door panels i would say do streetbeat from trunk with it like you are now. but i they aren't modded then trunk 1000+ would be your class an i must say that your like 4db's away from the current leader in that class. your doing good bro an i love the build keep it coming an where is that video.
oh an the deadner in the box i am not sure about that i would just resin the inside of it an sand the piss out of it till its smooth as glass.