Steve, the only leafs under the Superformance-Brock Coupe are the ones on the road after an autumn freeze. ;-)
It's all state of the art suspension with influences from Roush engineers and one of the designers of the original GT40 and 427 Suspensions who also happened to be SPF's own engineer, Bob Negstad.
Peter Brock admits the coupe is very comfortable, stable and secure at very high speeds. Many who have proven those speeds to themselves have reported that it is unlike anything they've ever driven before.
Here are some photos of one Superformance-Brock Coupe's suspension just out of the crate and not set up yet...
http://performanceunlimited.com/scof/coupe.html
/Randall