You should be able to drop quite a bit more than 1.25". That isn't very much. If you want your camber perfect, then yes, you will need a camber kit. Dropping it 1.25" won't change the camber drastically. You'll still have a little inner tire wear. Regardless of whether you get a camber kit or not, get your toe adjusted after lowering. The toe will change with your now negative camber and will chew the tires up over time.