You may want to check and ask when you go to a Firestone, Merchants, Goodyear and all of those shops if they do not warranty their alignments if you have after market/altered suspension setups. I know years back when I worked for Merchants, they wouldn't warranty them. Then again most of the Merchants shops I worked at with them didn't have anyone worth a damn doing alignments, just toe and go, don't worry about the rest. Say it can't be adjusted anyways. So it didn't matter.