help with lowering springs

I have a stock 2000 celica gt. I plan on buying a set of 18" rims and putting on a set of Eibach sportline lowering springs. The srings should lower it about 1.5"(front) and 2.00"(back). I measured it and i think there wont be enough room. I was wonderin if anybody has done this and if so did you have any problems with the tire rubbin or anything like that. Any help would be appreciated. Thanks