Finally I could test my new set of Viking DA Shocks that I installed in my car. These shocks already improve my 60ft from 1.58 to 1.54 but I'm still having tire bouncing on the start.
My car is an A Body, 3300lbs Small Block with 464WHP, Footbrake, 4500 Stall Converter, Hoosiers 28x10.5, 4.56 Gear, Leaf Springs with Assassin Traction Bars.
I'm sending two videos of the start... So if someone could see that and can support me to fix this issue will be great.
I think that I'm having same problems that MrHotRod had with his car...
My car did the same thing, bounced like that until I put more air in the tires and loosened the rear shocks to make it stay on the tire. It liked 13 lbs. in the slicks and #3 setting on the Rancho shocks. My car is about 500 lbs lighter than yours.