Most ideas were shared already. I went through this a couple of years ago and IF all your front end components are in good shape and to your liking only then I would recommend to get into the springs. Moog in general makes a good and quality spring, still US made. I would get a strong spring for a big motor and AC, and most likely if installed correctly (I say that because of the positioning of the spring) your front end will be a tat low. Measure both sides to the wheel well and use a floor jack to put the front end were you like it. Then go here: http://www.globalwest.net/1105.html to order spring spacers to get the desired height. Spacers were actually installed from the factory to eliminate leaning. I have them installed on mine and am 100% pleased.