Originally Posted by Deuce
You will find that a rack, mounted like you have yours ( to the frame ) does not work well in real life driving conditions. When the suspension moves up and down ... BOTH the front wheels will want to change directions. Both will point either inward or outward ( depending on the chassis movement UP or Down ).
Just a old mans opinion.
It's not just an opinion, but a quick study of simple geometry will show that with any vertcal movement of the axle, you will get wheel alignment changes. What most folks refer to as bumpsteer will be the lesser of the 2 issues that you have created.. If the suspension has very little travel and minimal body roll... it might be drivable.
I'm not trying to discount your efforts, but there is a reason that people do not put frame mounted racks on straight axle cars. Any benefits you would normally get from a rack and pinion will be overshadowed by the effects from misalignment.
The bumpsteer and toe changes you will experience will be much greater than any other system.
The commonly used straight axle using cross steer and any type steering box, there are no alignment changes, only varying degrees of bumpsteer, which can be easily fixed with a panhard bar..