My father recently purchased a '66 Mustang and it's all in pieces now. He plans on selling it after refurbishing it. Would dynamat be a good idea to do while it's all apart? He's puting the original AM/FM stereo back in, so it would be more for road noise than music.

I only drove it once and the windows were kinda down, so I wasn't really looking for road noise. I don't know first hand how bad it is, but since it's old I would imagine it sucks.