My Brother has SS springs from about 3 years ago, with the stock shocks it still went 1.45 60ft, then switched to Strange shocks and its more consistent, runs 11.00s on M/T drag radials, drives it to the track runs 2 classes and drives it home.

1965 Plymouth Barracuda 273 M/SA
1970 Plymouth Duster 360/904 10.60s with J heads