A lower profile tire will open up the space between the fender well and the tire, making the stance look "off". You should also consider modifying the suspension itself to help lower the car for a better look along with a different tire profile. Some suspensions are easy to lower while others are harder to do, based on their complexity.
"That's Spenser with an 'S' like the poet." Robert Urich Spenser For Hire 1985
On my bench-1962 Chevrolet Sinkhole Corvette; 1962 Ford Thunderbird Sports Roadster
Classic Plastic Model Club
The name is Mike...mrmike!