When I did my SOA, I used longer perches from Chassis Unlimited, and get no spring wrap that I can tell, but I also have 2-3" lift springs.
My best advice on a SOA is that if you think you can do it cheap and drive on the road safely, you are very wrong.
After doing mine, I have had a lot of steering issues which are only going to be resolved by going with a high steer kit for the draglink, not to mention having to get a rear driveshaft custom built.
I am happy with it now, after getting 98% of the issues out of the way, but I have more money in it than I thought I would, and I did all the work myself.
things to remember......
-the proper length shocks
-rear driveshaft mods
-welding the perches after getting the proper angle front and rear.
Some people will tell you that you can get by with doing it for a few hundred, and I have done that in the past with stock springs too, but my recent venture on my 90 YJ different than expected.
It cost me more money and time for sure.