yes, ive had plenty of problems with scraping, but it was usually only on steep inclines or higher speed bumps (or if i had a rather "healthy" passanger). that was with 2" lowering springs with the lower isolators removes. now i have a 1.5" drop and dont scrape at all anywhere, unless its an extreme incline or something like that.
1st pic is of my 98gt with the 2" lowering springs, stock 17" wheels:
http://i13.photobucket.com/albums/a267/ender03/1998MustangGTAfter-1.jpg
2nd pic is of my 98gt with 2" lowering springs, on 17" Bullitt wheels:
http://i13.photobucket.com/albums/a267/ender03/BullittStyleRims-1.jpg
3rd pic is of my 98gt with 1.5" lowering springs, on 17" '95 Cobra R wheels:
http://i13.photobucket.com/albums/a267/ender03/100_4637.jpg
4th pic is of my 98gt with 1.5" lowering springs, on 17" '95 Cobra R wheels in motion:
http://i13.photobucket.com/albums/a267/ender03/Savi Ranch PCH Cruise/8-19PCHCruise006.jpg