Elsewhere, I read about 10 mm adjustment screws at each corner which could be turned counterclockwise to lower a Vette. Do Vettes come at max height or can these screws be turned clockwise to RAISE a car? If so, how much can a Vette go up, please?

No one knows about these screws? Anyone have any other methods to gain a little ground clearance besides taller tires or longer, stiffer shocks or redo of the springs which I wish to avoid? Anyone out there? I am not about to mess up a Vette with a weird redo and am actually trying to keep from messing it up. I am getting real serious about getting my first Vette in many years and they are lower than they used to be and I really want a bit more clearance. Help? Somebody?