I've been modifying vehicles since I was a youngster, bikes, skateboards, Dirt Bikes, ATV's, (ATC back then) Yachts, Boat's, Trailers, RV's, Big Rigs you name it, If someone paid me to tear apart their rig and make it better I would, however I know when to say when. With Chris's help I exceeded my expectations as an installer with my Van. If you have a single creative bone in you, you will regret not doing this yourself. Just be patient in doing so. Look beyond what is in front of you and see the challenges that stand in futures way. Talk with Chris a few times, the hurdles he has over come in designing this kit are remarkable.
If you are close by and want to see my van in person you are welcome to do so.
I'm curious as to why you believe that a trailing arm set up is better for van ? I used to feel the same way because of my TJ rides like a dream with no steering stabilizer on old MTR D rated 37's.
If you are going to do a link set up, go straight to custom arms and brackets you can easily adjust and avoid all the nonsense in making brackets to hang down just to accommodate factory trailing arms. I've been toying with the idea of changing over to heims or the metal cloak Duroflex joints in my TJ because the delron wears out to fast in the RE parts. The heims will start clicking and making a bunch of noise and will transfer more vibrations so for a street rig that's why I'm leaning toward the duroflex joints.
my brain works in the way that if you need it done I start working on how I would do it. An hour with POLY performance should kill your wallet and give you some idea of how much it will cost to create a four link. I would move the axle forward and change the spring perches to get some more up travel and keep the frame cross member out of harms way. (Theory) Thinking about a TTB, hmmm, that could be why Agile Offroad uses that set up, as suspension compresses the TTB creates a V pocket for the cross member to sit in.
sorry for blabbering