Review on High-Performance Energy Suspension 9.9137R Universal Bump Stop for Jeep by Troy Gerhardt

Used for 4th generation F-body. Much cheaper than dedicated F-body fenders. As others have said, all you have to do is sand down the studs so they sit flush. You will see exactly what should happen when you remove the old stops. 5 minutes with a cut-off wheel, some paint or anti-rust, and then screw on the baddies.