RETRO

I was talking to a guy the other day about my lift kit..I put SAW on the front and Alcan leafs on the rear for 3" of lift...I have yet to install the shim for the rear for driveshaft angel..He said I need to do that plus need to do something for the steering like a drop or something..Is this true? What should you do for the steering to place back into the stock angel? I did a search and only found bushings for steering..I know the diff drop is a waste of money not sure about the steering part..I am a greenhorn on the lift part..Thanks Patrick