You are gonna need to start with all new bushings, then look into off road suspension setups. I have no experience here. But I know you will want to strengthen up the suspension quite a bit. Not stiffen it. I'm sure there are a couple guys on here who may know some must have goodies that you will need.
Cobb ap stage 2 ots, catless uppipe, catless turboback, Cobb Sf intake.