a-body Rack and Pinion

The steering arms are designed to provide the correct ackerman in a rear steer system. Swapping them to front steer doesn't work because they have the opposite affect and you won't be able to steer the car. Putting a rack into the Kframe can be made to work ok, but to get it even close you'll have to fab up your own steering arms.

The best way to do that is to make a pair out of thin junk metal and use washers for spacers - this stuff will be easy to bend and adjust. Once you get it all adjusted that the geometry is right, copy the shape with better stuff to make the permanent arms.

It's not the rack that causes problems, it's the geometry - All the pivot points have to be adjusted to work with the new pivot points of the rack, which is easier said than done with the stock suspension parts that were intended for a rear steer layout.

To get an idea of what you need to do, You can do some online searches for terms like Ackerman Steering and Bumpsteer, which are the two biggest problems you'll experience.
In a drag car, steering isn't much of an issue as long as it's close enough that the car is stable, but on the street, steering geometry is top priority.