I'm lowered about 2.5" front and 2" rear and only have minor scraping issues with mine, it's not enough to ruin my tires at least. Personally I would install the wheels and then drive around for a couple days to see if it rubs.
Sold - Black 2000 Mustang GT, gone but definitely not forgotten
- Silver 2007 Corvette
Current - DHG 2001 Bullitt