If you are willing to replace your kick panels then you might want to look into having custom door panels made with speakers built right in. Although if you have a good shop make your kick panels they would produce a much better soundstage than a door panel would. They (kick panel) are just harder to get a bigger speaker in them. I'm starting my stealth stereo this summer in my 66 lemans convert. I will post pics when completed.
http://www.kurtspontiac.homestead.co...y66Lemans.html