I asked after this post came up and was told Olds Aurora but not what specific model year...
Installed zero-rate springs on front to keep the springs from popping off at full droop. I also flipped the front shocks for easier access to the adjusters and slightly lower unsprung weight.
Can I ask where you sourced the zero weight springs and what the part number is? Not required for the rear?
THere is a link, and an explanation on the wiki: https://slctech-slcbuilderswiki.pbworks.com/w/page/76518080/Suspension
You don't need them for the rear unless you use 4 lift pucks. Most everyone finds the front-only lift is adequate.