Mike, I have a convertible, so the extra weight creates more sag. Rear would hit the tailpipes over bumps with people in back. But if you look at GM marketing pics the rear was slightly lower then the front, which was not what I wanted.
I think this is the before pic, (actually I think I had a set of repro monos on for this pic, which is why I settled on the 1.5" over stock)
Then I replaced front springs with moog 6320s and put the re-arched monos on (repros when on a shelf)
Hard to see, but I think I got the front down about an inch and the rear up almost an inch.