I struggled with my rear suspension for the better part of year...
Monoleafs
Caltracs
Relocated vertically behind the axle DA Vikings
Spring sliders...

A local 8.5 guy who is friends with some of the fastest Caltrac guys in the country came to the track to help me after talking to his buddies.
Before I unloaded off the trailer, he put my caltrac bars in the upper hole, 1.5 turns preload and changed all my shock settings front and rear...

In four passes I went from the blowing the rears off to pulling the fronts an inch or two.

Caltracs need a lot of front end lift..You can slow it down with DA shocks, but the lift still has to be there, and you don't want the front end to just drop down, that will unload the rear....Front is as important as the rear.

Ya gotta watch it in slow mo...Period.

Paint a stripe on your tire and have a buddy video your launch and slow it way down, the stripe lets you know know it's slipping...