Lowering Rear Only (leaf removal)

I have read that you can remove one of your rear leaf springs to get a leveled look. You guys that have done this do you have your stock shackles or longer aftermarket shackles. I didn't know if I need to do both or would doing both be lower than the front? I have a 06 2WD CC...
Also, have any of you after removeing a leaf hauled/pulled a load???

Thanks!