Raising Rear End Height
I was admiring the elevation the Moog 5237's added to my GTO and thought I would post some empirical data.
Before changing the old rear coil springs I took three measurements (rear edge of the quarter panel, center of the rear wheel and rear edge of the door) on the passenger side and marked the locations with blue painters tape for the "after" comparison measurement points. The "before" heights were 33 3/8, 37 1/4 and 39 1/2 (rear edge of the quarter panel, center of wheel hub and edge of door respectively. The "after" heights were 39 1/4 (almost a six inch delta!), 41 1/2 and 41 1/4.
I suspect my rear coil springs were probably far worse than other cars to begin with. The first owner put monster coil springs in the front (which I suspected came from a truck) that dramatically raised the front of the car. It was so high gas jockeys (remember those kids before self serve?) would peek under the car to see why it was so high. The ride and handling were awful and after driving it cross county to get home, I restored the front suspension with new OEM coil springs, shocks, etc.; no longer was each tar strip a teeth jarring experience and it did wonders for improving tire life.
I have not put the car on the road yet so I can't speak to ride comfort, but I really like the look at this point.