Roll the port down toward the floor board, and try to get it about 3 inches from the back of the car. you can possibly even try rolling the port the direction of the fender which would load its output directly into the corner. But that is not critical. The corner serves as a natural amplifier...similar to when a cheerleader yells into a megaphone. I'll be surprised if you don't notice an increase in bass.
i havent tried sliding it back any i believe i can go a few inches without it hitting my hatch.im gonna try it though and see if it makes a difference.a freind of mine had a camaro like this a long time ago and he had 4-8"tubes in it and it was earth shattering bass.you could hear him coming for a mile easy.thats when i fell in love with bazooka tubes.
Thanks for sharing your install. We used to have a Camaro demo car in this body style with 2 6" passive tubes that really rocked. The shape of the hatch really exploits the corner loading horn effect the Bazooka's are designed to take advantage of. Have you tried sliding the tube closer to the rear of the car...toward the taillights? If there is room, you might get a 2dB increase in bass efficiency. Again, thanks for including it in our Garage.