I am looking to lift my 6duece about 3inches. I have been told that I could replace the stock springs with heavy duty springs and use 3 inch lift cups. Is this true? and is it that simple? Its a 4door sedan. Putting a 350 small block under the hood. Anyone with some wisdom please help me out. Im not looking to air ride or nothing like that. Just a simple 3 inches and a nice looking mean stance.