Hey JrseyKid686, on the box you might want to seal the ports. Ported boxes don't work as good in Sedans as they do in hatchbacks. If you want a port take the back dash 6x9'* out (personally don't suggest it due to the inbalance of highs and mids -unless you put some components in the back doors like I did to fill in the gap and give more of a surround).
Anyhow, good luck on the install -the Bose is nice, but those RF'* will give you the bumps -HARD!!!
My friend took his Bose stereo out of his 1998 SSE and put a standard Pontiac CD w/ EQ in and added a single Eclipse 12" sub with a 500 watt Eclipse mono amp and they sound difference was astronomical. But then again they are two totally different beasts -Bose for quality high'* and mid'*, but the standard CD EQ and bumper just rattles your brain while the mids and highs were maintained by the stock Bose speakers.