If you have a g-link I'd let Carl help you out.
He assisted me with the same situation on my car and we ended up with the longer spring but a lower height and its worked out good for me. Unfortunately I don't remember the exact spring we went with, but he might have it on record... I could also crawl under there tonight and look if it would help.
Pic of mine and current ride height is attached...
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69 Camaro RS - Alston G-Link, Speetech front control arms, LS2/LS3 engine, Vortech T-trim, Magnum T-56, Iforged Monaco wheels.
www.fquick.com/jim98ta
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