Stock suspension back on? EVERY TIME you touch your suspension even to raise and lower just half inch it will throw the alignment out. Suspensions nature is to camber itself the lower it goes (aka regular driving over a bump) So when you lower your cars height, it will reenact "going over a bump" and camber itself. toe and caster also change dramatically when you alter the height and this is what wears tires the fastest. you altered the suspension geometry and all depending on how the suspension was built (ball joint location and such.. ) this will all determine how much your alignment will change. What you're gunna want to do, lift the tire off the ground, grab it at 9-3 and wiggle it.. if you don't have play that a good thing. tighten all the nuts and bolts and re check them again before you bring it in for an alignment (they get mad if they have to do the work all for you) and get it done. don't be cheap. you save 120 for an alignment now and it will cost you 800+ on rubbers very quickly.
Double check everything is tight, and bring it in. DONE