If your suspension is in good shape and properly installed, your car shouldn't actually sit higher in the front than in the back. Yes, there should be a larger gap in the wheelwell on the front than in the back. This is merely a styling feature of these cars. If you measure the distance from the lip on the bottom of your rockers front to rear, they should be virtually the same.
If you lower your car, the back will still "look" lower than the front. What you can do is either get coil overs and adjust as you like, or add shims to the rear strut mounts to raise the rear end. Remember though, if the wheelwell gaps are even, your back will probably be higher then the front. Just keep this in mind for handling reasons.