No matter how you look at it, this is the best option for any classic car that is non-invasive and easy to access.
I would suggest doing something for on the fly volume control. Some MP3 players have an inline volume control, but it's nice to have something solid state or electromechanical, like a potentiometer to control volume, where you know you can find it. MP3 players tend to move around the cabin of the car. I like it because I don't like giving anyone any reason to try and enter the vehicle to steal something. I also don't like hiding controls from direct use at the driver's seat, in view. This is the best of both worlds, because the equipment is gone, but the controls aren't.
Even if you wanted to get teenager on it, it's still an excellent piece of equipment for a high watt system with an amplifier and $700ea subs. Um. Yeah.
Don't forget your competition weatherstrip. At full volume on a high watt system, you can see the jamb gaps open. ;)
