I think it’s safe to say nobody on this site had used that kit.
Your other thread had some comments about it that even though you aren’t rock crawling this kit isn’t going to work for you.
If you are that set on four linking the truck you could probably do better starting from scratch with a pre fabricated truss, frame side mounts and a lot of time with a 4 link calculator.
Or for no more you are doing with the truck slap some ez-ride/soft-ride springs and Bilstien shocks on all four corners.