For starters, this website has some pretty cool custom f-body boxes.
http://www.subthump.com/acamarostealth.htm
That particular body style is great for bass, even a single 10 will sound very loud due to the hatchback design.
Are you just looking to add subs? Or speakers, everything? In my camaro I just added a sub to the stock monsoon system and was pretty happy. I also remember installing just a single 10" jl W7 in a trans am and being blown away with how loud it was in that particular car.
Wiring will be tricky if you have the monsoon system and replace the head unit AND all the speakers.
