I tried Caltrac's on my E-Body, but the ride quality on anything but a dead smooth street was brutal, although slightly better than a correctly set-up pinion snubber that is virtually touching the floor pan.
I took them off and sold them. Then I put on a two passenger side 2800lbs SS springs on both my 3700lbs A & E Bodies, fitted properly adjusted slapper bars and installed quality shocks.
The result was the most compliant ride and best handling and hook-up I've experienced in over 3 and a half decades of running these old Mopars.
