If you are going SOA with 6" springs there is no steering kit to help you out. Most steering combos are made for about 4 to 6" of lift, but if you are SOA with those springs you will be at about 11" total lift with just that.
If you are running a D30 then you will have a hard time getting steering to line up that high due to the lack of support for it. If you have a D44 up front then you have alot of options and can get pretty creative if you understand the geometry of your steering system. Just remember that the idea is to keep the drag link parallel to the ground for the best response and to eliminate DW.