I put the duster on the drag strip

Limited slip,obviously. The A-100 springs,a new one on me. What rear shocks,guy? That could be limiting ,the rear suspension rise. Stock a body shocks?

Air shocks (yeah yeah I know)

The rear end picked up and then started spinning.

As far as leaf springs they are 73 duster spring with spring added from an A100 van for a total of 7 used to lift the rear for a rake look.