Car Bounces after 60 ft. What is causing this??

Launching at a lower rpm will only make it hit harder as the lower rpm you launch at the higher the converter will flash hitting the tires harder making things worse, My suggestion from what I see going on is the front of the car is way to tight and needs to be loosened up and maybe remove the upper control arm limiter snubbers so there is some upward travel then go to the rear and tighten up the rear shocks lower the tire pressure to 6.5 lbs. depending on your converter stall if you have a trans brake I would launch it around 3400 rpm and the car should hook and leave with the wheels in the air, If it's still spinning the tires as bad as it is then I'd look at some new slicks ! I know how to make a car leave give it a try I'm sure that should put you in the right direction good luck . Nice car by the way !