We do not have complete kit instructions done yet but each component has their own instructions. If there was no instructions with the parts they are all available on our website with each part. The control arm and shock bracket instructions will have our recommended lengths. I assume you are running 37" tires, 4" bumpstop spacers and a new CV rear driveline? You should make the lowers 20.25, uppers 18.25, you can probably mount the shock brackets all the way up with the fox shocks. Make any pinion angle adjustments with the upper links. This should center the wheels in the fender but you may have to trim the body in the front of the fender opening and the stock rock sliders. If you push the axle back any further, the bumpstops will hit the track bar bracket on the frame.
The brake lines have a short 90 deg hard line at the caliper, feel free to tweak that to position the brake line where it needs to go. I will have to check out those front shocks to see what you can do with the brake lines.
Those of you that think you know everything really annoy those of us that do!