subs instead of seats in firebird?

I was just wondering if anyone had ever seen a firebird or had a pic of one with the back seats taken out and replaced with a big wooden or fiberglass sub enclosure. I really wanted to do this since the back seats are practically useless unless you are a skinny midget and because there isn't really as much trunkspace for this as one would think.

Also, I wanted to know if any of you had heard of Quantum subs and if they are any good. This guy that owns a body shop in my town has a bunch of them in his truck, and they kick ass, but I didn't know if they were likely to go out fast or anything...

someone hear did that years ago, had a wall behind the front seats. Looked alright I guess, a lot of work though