Personally, no way I would do the rear steer rack. Whats the point. It's in the way just as much as stock stuff.
On Billy's pics, the reason the ackerman is off is the position of the steering arms. Fix it like gut's and the problem is gone
Monte... I think it is common on the Aussie cars because they originally had the steering box mounted further back and on the frame rail then a US car, so the rack makes a bunch more room, especially on the "driver side" then having the box squished in there.
In my case, it was not a drag car, but a Hemi6 with six-pack but I wanted the much better ratio then the steering box originally had.
Rack setup saves weight over the box as well..