You have to be a bit more creative in the Z but the space is there if you look hard enough. Now i've done the install, I wish I had done it differently and used the space in other ways so I may finish building my door builds then redo the boot...we'll see I guess!
As far as the Epicenter goes, I love it. Would highly recommend it and they aren't silly money for the product you get either. Sounds like your last car was a pretty sweet setup, have you got any pics?