Ss spring tuning

I have the same springs shocks and tires as you but I have a 904 with a 418 stroker my car hooks real good and goes straight but about 30ft out the springs seem to unload and my wheels start hopping have any ideas to a cure ?
Besides different tire pressures?
are the rear of the leafs free for max movement? In banding the clamps help.

Raise air pressure in the right side. Right, wrong, or whatever.... Been doing this with the cuda in my avatar. Straight axe, 365 ci 4 speed, 28 x 10.5 Mickeys, 4.56 gear. Always wanted to pull right when I let out the clutch. 10.5 psi in the left, 11 to 11.5 in the right. Straight as an arrow.
Thumbs up on that one. Excellent track strategy.
Ensure the rear is installed square to the chassis. May need to shim driver side back.
Excellent bad starting point.