Opinions on rear spring idea

I've noticed a lot of people on this forum talking about using s/s springs. They are for drag racing only. There is a big difference in the left/right bias of them. The overall thickness of the leaf stack is different from left to right also one side has the bottom leaf facing forward to preload the front while the other side is reversed. They do a great job on straight line acceleration, but have a definite difference in roll rate between left and right turns.