Lowering a 67 dart

I have a 1967 DART GT that has been sitting in storage for 10 years and no I would like to start working on it. It is a 273 car. I plan on sticking a big block in the car and would like to lower the whole car by 2-3 inches. Are there any kits available or does anyone have any helpful ideas, links or maybe could point me to an article on the subject? Any help would be great.