I really dont see any advantage to a rack in the rear steer setup. A rack is larger than a draglink. Still cant use a truck oil pan. Headers will cook that rack.
You dont see any advantage in maintaining factory steering geometry? Yes the rack is marginally larger than a draglink, but the exhaust is not so close that it would "cook it" at all. I'm using a Milodon high volume pan with it, that's good enough for me. There are pros and cons to forward and rear mounted racks I suppose.