68 Camaro Sub--Real results needed

[tumper93]

I have searched and read every thread I could find on this but none said how the results truely were. I listen to 80-90's rock like Metallica and want sound that makes that type music sound best. The interior of the car is fully dynomated and has an aluminum devider behind the back seat that is also dynomated and sealing the cabin from the trunk. I plan to finish the trunk like many on here have. With that being said would I be better off firing the sub rearward, towards the floor with ports through the package tray, or cut the package tray and mount it pointed towards the rear glass with the box being under the package tray. The other parts of the system are RE XXX 6.5 components front and rear with US Amps amp and Alpine head unit with built in cross over etc. What is some real world results in your setup