One of the best muscle car sites around for GM fans is LS1 Tech. The muscle car forum is just loaded with information on part installations and cool muscle car pictures. If you have a question too anything? There's a lot of muscle car enthusiasts that will be able to answer it. It will also save you a lot of time and money. I'm on there almost everyday learning new things about GM muscle cars, it's almost an addiction. The community is growing day to day so I suggest checking them out!