Replaced all four my trimmed Moog springs (F body rears) last fall with a set of Detroit Speed 2" drop springs. Stance was great with my OLD springs but thought is was lower than 2". Didn't have any front travel left as I was always on the stock rubber bump stops. The rear F Body springs where trimmed, sat pretty good and with a slight rake. I could still have two people in the back seat WITHOUT bottoming out.
After installing the D.S. 2" drop springs the front was where it was before (nothing gained) and the rear was slightly lower. Car sits level now. Can't have two people in the back seat anymore without the upper control arms bottoming on the rearend bushing ears. Rears are allot softer than the trimmed (increased spring rate) F Body's were. I'll leave the fronts alone for now but will go back to the F Body springs in the rear.
If it were me, I'd stick with 1" maybe 1 1/2" drop springs. Just my .02