If you change just the front springs to drop springs you will get the raked look. I put 2 inch drop springs in front and back and then 2 inch drop spindles on it and got a nice rake. You might not like the ride height, but you could put drop spindles on the front and get the same rake, just higher off of the ground. The Impala springs would give you a halfway point for the ride height. You have to remove 0.030" of shims from each upper arm stack for every 1/2 inch of drop to correct for negative camber. If you use just the drop spindles, your adjustment for the camber should near "0".