Wheel Hop Clamping Leaf Springs
Try a stiffer rear shock. I had good luck with Rancho 3 now 9 way single adjustable shocks. Cal-Trac relabeled but not sure if there were any changes. Forgot the part # & car not here to check. My car wheel-hopped under certain conditions even with SS springs and with Mopar 4-speed rear drag shocks or Competition Engineering shocks until I went Rancho.