I'd be in for atleast the 6.5" kick's. The complete rear deck sub setup sounds like something I'd like so I can ditch my 15" sub/heavy box, I'm more into SQ anyway. A little more info or pics of the prototype would be cool!
Great idea for a GB
2005 Ford F150 SuperCab FX4
1964 Chevrolet Impala SS
1998 CSVT: 354HP/328TQ @ 10 psi, now gone