From what I understand, there was a question about the "official" GM specs for Impala SS since the alignment numbers were the same ones given for the Caprice. I remember waaaay back on the original Impala SS LiSSt, someone posted revised specs that were supoosed to be an improvement over the factory numbers. The GM specs apparently didn't take into account the much wider wheels and tires on the SS. Maybe someone out there can pull those up? I'll snoop around on the net and see if I can find them and post them.