Not a whole lot to go over but I thought I'd update a little bit. I've been pretty busy with other projects, I got a whim to install Caddy lights in my truck so I've been preoccupied with this as well.
Here's a pic of the 660GTi's installed behind the factory Bose grilles. Those wave guides were a tight fit. Tough to see but that's how I wanted it.
Alpine W404 is installed. To the right is where I mounted the bass control knob for the Sundown. Yup. the MTX's are gone.
I left the factory mic installed and just mounted the new Parrot BT one right above it. Works great there with no issues.
Here's a couple shots of test fitting the box. A lot of angles here to maximize as much airspace as possible. I decided against running both RE sub's and have opted for just one instead. Seat will be raised 2" to clear. Sub box is right at 1.0cf. I am also building a custom amp rack to house the JBL crossover and Arc amp under the seat.
Speaking of Arc.
I decided to rewire some things behind the seat. I wanted to get the audio portion as far away from the power supply as possible. I also placed the mat back behind the mounting board instead of a direct mount to the back wall.