AAL with AirLift bags for 2nd Generation

I am planning on installing Airlift rear bags on my '06 4x4 with the TRD towing package. The airbags are primarily for towing but I want to also fix the annoying 'clunk' associated when stopping (ie. solution to grease the drive line and prevent rear axle wrap). Will the air bags alone prevent the axle wrap or should I also install a Toytec 'add a leaf' to the spring pack? Will I also need to extend the brake lines with the bags? Input would be greatly appreciated.