Ride height is established when the car is built, or should be. Suspension geometry is set, shock installed lengths are set, room for the tire is set. What you can do afterwards depends on what suspension was used and how much adjustment is provided. Lowering the car also lowers the ladder bar/4 link chassis brackets and shock mounts and the geometry can become a problem.

On a typical back half/stock front suspension car, the front suspension pretty much determines what you can do. You can do some modifications and even move some things, but you can only get a car with a stock front clip so low. How low? On the travel limiters if you want or until the tire hits the inner fender, but that's not recommended. Look at some of the Hemi Super Stock cars to get an idea of how low is possible.

The short answer is, when starting from scratch get the front end where you want it or where you can get it and then drop the back of the car down over the axle/suspension to get the correct attitude. I don't think you ever want it to have a rake to the rear. Make the rocker level or raked slightly down in front for it to look right.