Yeah, I know 3 inches in the back doesn't appear as common. I was looking at these coil overs that provide a 3 inch drop (see links below). If you want to go lower, you have to use blocks with it and that takes away from ground clearance.
http://www.classicperform.com/produc...dapter-Kit.htm
http://www.classicperform.com/tech_a...coil-overs.htm