'69 Dart rear suspension kit questions (RMS and ControlFreak)

I have a control freak setup,triangulated four link, "mini tubbed",2" narrowed 8-3/4 and wilwoods,325/50/15 m&h on leftover 15x10 cragar 610ss's. install was nice and simple .without the street lynx lower arm I could probably put a 390 under it .I got a great deal on it.one was up for sale on racing junk.I called control freak to ask questions about their system before contacting the seller.they offered the kit new for less...sold