Road Noise
I need to add some to the back half of my car. My 3.73's make a little noise so the front, top and rear sheetmetal around the axle needs it the most in my case. Then we'll see what the next loudest source of noise is.
I've already done the doors. They should be the first thing that everyone does. Do the whole inner door panel and if you have extra, add it to the middle of the outer door panel. Not only will it reduce outside noise, but it will make your door speakers sound louder and better.
Lot of good info here:
http://www.sounddeadenershowdown.com/
The Best V8 Stories One Small Block at Time



