I am fixing to do another SOA. They are not to bad if you have a place and a welder. main thing is that you will need at least a drop pitman, slip yoke eliminator and CV shaft. The rest is not bad as far as just using new perches and so forth. The cost i figured is about the same as a 4" spring lift. I have been researching it alot. But that is if you do it all yourself.