So I'm putting together a road car (72 dart) designed for long road trips. Highway gears, gas sipping engine selection, comfortable bench seat with an armrest, cup holders. A lot of thought given to accessories. Then comes the audio..... I've been daily driving a 68 dart for the past 7 years with a radio delete plate and I've had it. So I'm thinking of an underdash mp3 with USB to some kickpanel speakers, a pair of custom made speaker enclosures that will bolt on the package tray in the corners. Then I'm thinking of a dual 12 inch subwoofer box or extra large bass cannon, mounted above the where the rear end is in the trunk. Then a package tray with speaker grilles left empty for the bass to come through into the car. Bass is key and has to be very strong or it is not really worth doing. I don't fool with old ass cd's, so it would have to be USB or blue tooth. Has anyone done anything similar, suggestions ??