About to pull the trigger on new leaf springs for my 1986 Toyota Sunrader. Reading the old posts about leaf springs, am I correct that the old emu CS010R are the right pick for our rigs? Would CS020R be a better option? My rig has some bad sag. Any direction is appreciated. I have a heavy duty truck shop near me that will take my rig in and put them on for me if I order the parts. Also have bags that will be installed as well.