First I don't want to start a war here, I am just trying to understand what my simple mind is failing to understand. I know that Calvets raced 60's mustangs and with the rear leaf spring design that they and other leaf spring cars, I can diffinately understand there need and how they function. A wonderful way to solve there problems but I get a little lost on there need on a Mopar. I understand the need for a very stiff front segment but once you acheive that how does there design put more down force on the tire???