How much higher are you looking to go? I've always lowered my cars a max of 1.5" all the way around. I've used the Steeda Sport Springs and the SR springs on my '95 GT. Both cleared just about anything I needed to at a reasonable speed. Both are very comfortable to ride in too!
BBK springs, Tokico Illuminas, Steeda LCAs, Max Motorsports CC plates, slightly oversized tires (26.3" front and 26.6" back) and my car does not scrape on anything while filling up the wheel wells and getting a nice stance.
No idea why ppl need these "slammed" cars and running around on roller skate wheels.