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Stiffer spring, move roll center, start with more load at ride height. Stiffer shock. More rr bar angle works if on gas. More bar split is a lot like a stiffer spring.

All these suggestions...

I would start at 2" Gap, then adjust from there.

Your rr has to be dynamically stiff. The rear of the car needs the necessary cg height and instant center location. (light lr wheel rate)

Are you referring to the Lr getting up, but using the Rr as a pivot, instead of compressing the Rr a bunch like the old days?