Lowering My C10

[JrCarr]

Hello everyone, I am sure this has been discussed before but I want to get opinions before I install the wrong part and am told I can't exchange something because it has been installed.

So I am lowering my truck 4 inches in the rear, how many inches am I suppose to lower the front so I get it as close to level? I have been told if it is 4 in the rear then 2 in the front, and someone else said 4 in the rear 4 in the front. Just curious, again I would like it to be a level as possible.