Without looking I can't say for sure.
I've successfully done an Xterra and a frontier. Then on another frontier, I had the same problem as you and his front could not go as high to even his out (well to achieve that 1" front to back height difference). He's stuck with a little more rake unless he has some payload in the back. Do you know if your rear springs are stock or maybe you have an added leaf for towing/load?