NooB problem.
And, someone correct me if I am wrong, the Camaro is wired differently than the Firebird and I think it's a Bird that had the subs working.
Since the amp and sub will be kept in the back (usually) the only wires you have to really mess with are power and RCAs. Ground can be in the back. Get a small enough amp and you can mount it behind the spare tire cover (lots of room really) and hide it. You can also ground in there.
Go to www.fbodyaudio.com and go to the tech section. One of the "FAQs" tells you how to get the power wire through the firewall.

