Thanks for being so cordial.Sorry to see you have a negative experience. I have seen others complain that they didn't get the drop they expected from these springs. A few things to consider/questions that came to my mind:
The shop you describe sounds nice. What kind of cars do they normally work on? These cars are up there in age and many of the youngsters don't know how to work on them.
We're your stock springs for the V-6? If so, that could explain why the car is at the same height as I'm assuming the new springs are for a small block. These cars set pretty high from the factory by today's standards. The center of the wheel on a stock setup is usually in line with the bottom of the rocker.
At the end of the day, more times than not, you have to trim springs to dial in the desired ride height. That's been my experience. I hope you get it where you want it soon. When you do, please come back and tell us what you did and share some pics.
Question: can you explain what you mean when you said this:
"We're your stock springs for the V-6? If so, that could explain why the car is at the same height as I'm assuming the new springs are for a small block. "
A v6 weighs less than a v8; I have a v8 now. Am I wrong about that? My thought process there is that if these were made for a stock gbody (v6, which is a sbc) that a v8 sbc would be heavier and thus lower the ride height on springs made for stock.