in my opinion, that shelf in the back of the trunk where the spare tire is located makes a great spot for a sub box, but you'll have to custom build a box cause there's no boxes made that would fit there. i can help you design a good box based on your subs if you'd like. i currently have an RE Audio SX 10" back there in a 1.4cu.ft box tuned to 34Hz powered by a rockford power series amp. there is a wiring harness track that runs the length of the car on the passenger's side of the floor that makes a good place to run an amp power wire. i'm running 0G wire and had no problems with it sliding through there. i used to install car audio, and for the size of the car, its fairly easy to run a power wire. you would obviously lose your spare tire, but by putting the box on that shelf, you get to keep all the rest of your trunk space and a lot less worry of damaging your subs. plus it makes it sound better in the car cause the subs aren't hiding behind the gas tank portion of the trunk.
i'm not sure why you'd want your car to sound like a drift car, but i'd imagine it would be pretty difficult to make a V8 sound like a drift car. you'd probably have to go with a straigt through exhaust system, or maybe "open headers" type thing. it'll be loud as hell but won't sound like a 240sx or skyline type sound...hears a link of a sweet youtube video of a 240 with an LS1 and a "tuner" style exhaust.