Looking at pass #3, My car used to jump off the ground in the rear too. I sent my Afco's in for re valving to be able to slow the extension on the hit. It made a huge difference, and controlled the separation much better.

1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)