I pirated this image from another rack thread;
http://www.forabodiesonly.com/mopar/attachment.php?attachmentid=121083&stc=1&d=1263334590
To me this is a good way to understand where to start from. The problem with this diagram is it doesn't address Ackerman angle. To get that, As I see it you would just shift both inner and outer tie rods left or right of those two lines. The length of the steering arm is going to dictate to some degree how far you go also as it affects the line that Ackerman falls on; tie rod end, lower pivot, center of rear axle. The whole deal can be a real can of worms to get it perfect. The first measurement that should be addressed ( just chose what I thought would be close) is the length of the steering arm needed with available rack travel to give full steering radius. Using the stock dimensions will decrease steering radius significantly. I am at about four inches cent of ball joint to center of tie rod end.
One thing this diagram pointed out is the need for as high a rack mount as you can get, to try and keep from narrowing the rack.
