SDENVER,
If your going to tell Superlift what you plan on using their lift for, you can count on Superlift not honoring their warranty. What they don't know who hurt'um, right? You don't NEED a spring-over-axle kit, you can use re-arched leafs as well and leave you axle where it is. Springs cost more though and only give you 4 inches of lift verses 5.5 inches with SOA. Plus SOA retains your factory ride in the rear.