As said the lower rear can help the car hook better. Gets the weight over the rear tires more. Myself I have my car the way I like it. I like the Nostalgia look with just a tiny rake with the rear a tad higher. But thats just my taste as thats what I like as I dont care for the slammed down look on the 60's muscle cars since its not the Nostalgia look I like alot. But its your car so you have to have it how you like it. It sounds like it sits real nice right now. Sitting level or a tad higher in the back is how most bracket cars seem to sit. I would leave it as is if your happy with it and try it at the track. Ron