Had CE 3 ways all around on my 9 secDuster. Thought they worked great, very consistant.
Mine worked best with left rear loosest, and right rear stiffest, with 002/003 leafs, fronts at 90/10. Later changed to 80/20, which helped control wheelstands better

69 Dart GTS A4 Silver All steel, flat factory hood, 3360race weight
418 BPE factory replacement headed stroker, 565 lift solid cam
Best so far, low 10.30’s 1/4
1.41 best 60 foot
6.56 at 104.17