Fastest Duster on stockish suspension?

You don’t need anything really special to get a leaf spring A body deep into the 10’s. If you can make the power. Most are way over-sprung. You just want enough rear spring to hold the rear of the car up and enough stiffness in the front section not to distort. Then control it with the shock. Remove the rear clamps. You might to add some extra front clamps. A 8-9” rear tire and a good double adjustable rear shock. A good single adjustable for the front will help with timing the weight transfer. QA1-R’s work in the front for me, but I’m never going to lift the front tire very high.