Super Stock leaf springs

I will find out this week . the back half of the car is currently sitting on 3 concrete blocks on each side and rear end is hanging from from shackles / KYB shocks. I have 2 slotted mag rims with tires I will mount them on the car . the other issue was brought up is if the car is driving down the road and hits a large bump and the body bounces and the shackles return to the wrong position ?
You're worrying about things before they happen. Just get the car done and back on the ground and go from there. I can pull hair out about what "might" happen next month, but how much better off will I be?