When you say springs are you referring to the rear leaf springs or the spring rate of the torsion bars?
As evidenced here. My setup can work except the bars. I don't know what he has. This is from FABO. I copied the post info from him.
@B3422w5 posted in September 2021
https://video-sea1-1.xx.fbcdn.net/v/t42.1790-2/1301447_10200852643291245_61459_n.mp4?_nc_cat=101&ccb=1-5&_nc_sid=985c63&efg=eyJybHIiOjY1OCwicmxhIjo1MTIsInZlbmNvZGVfdGFnIjoibGVnYWN5X3NkIn0=&_nc_ohc=885vnNG5mWYAX988dQy&rl=658&vabr=366&_nc_ht=video-sea1-1.xx&edm=AIbDutUEAAAA&oh=00_AT9T80W7neJK_XiuhGosSPZ542jWMHi-4Ige9gj-vsn94w&oe=61C78583
this is me in my old car( blue duster, 422W5 deal) dialed 9.85, racing a 9.92 car, he went red
Serious SS/AH type wheelstand
002/003 leafs, no snubber, CE 3 ways all around, tripping beams with the backs