I used a one inch lowering suspension kit when I restored my CS. I have had some front tire clearance issues and I tried to solve it with a narrower front tire. That didn't work so I removed the leafs and coils and replaced them with standard springs. That left me with the characteristic negative rake of the classic mustangs. Last weekend, I removed the coils again and cut one full turn from them. Here's the before and after pics showing the change. There have been other threads concerning suspension changes and I thought this might helpful to someone facing the same situation.