I'm going to guess you have a Samurai since you brought up "SOA" as in spring over axle if so though most of us use SPOA (SPring Over Axle), when doing SPOA on a Samurai you will need to correct your steering and put on longer brake lines at the least, it would also be wise to either get longer drive lines or get extensions for them. If you don't want to do any of that you might want to consider going with 1" longer spring shackles or 1.5" lifted springs which you can do with the springs under the axle.
Let us know what you have whenever asking questions here though so we can try to help you better.