First you have to make some decisions. Like how much travel you want, what kind of camber change is desired, what KPI you want, what kind of caster you want, if you want to design adjustabliity into any of these parameters. A good starting point would be to find stock specs for all of these for your truck and decide how much you want to change each one. Take alot of pictures of your stock suspension, mounting points steering, and detailed measurements. That gives you a base to design your modifications from.