whys my cars butt sit so high?

they very well could be superstock springs. or at the very least xhd340 springs. lol cudafever i know about 50 percent of the people i encounter love the way it the car sits but me personaly i like cars that sit pretty even almost like a chasis car. and its not like i can stuff a huge and tall tire under there to fill ir out as i have stock wheel aches and no mini tub so right now im stuck on 255/60/15s. prettybluedart do these lowering blocks effect the performance of the springs? as far as im concerned they perform just how ma mopar designed them to and wouldnt be willing to compromise performance for looks. and id have to have about 3 1/2 inches of drop block to get it where i want. also i heard on another forum of having the springs de arched? does that sound reasonable or by the time i do that should i just buy new springs??