IF you want to see what a good launching leaf spring car looks like, i can text you a vid. We were at lebanon with my buddy nova saturday. 1.3X 60 foots. Leaf springs with cal tracs. Rear shocks are almost full tight on ext. He also had springs higher into the body. At Cal Tracs recommendation he lowered the front spring one hole and it works very well.
My Cell number is 914 417 1312. shoot me a text and ill text you back the vid.