A Body Rack and Pinion Converison

Would the fact that the 1960-62 "A"-body unibody was narrower than the later models prevent you from using a Dakota steering rack?

I sure wish I could improve the steering on my Valiant. I'm using the slow-ratio manual steering box, stock A-arms, and disc brakes. Tire size is 205/55-15 in the front and 225/60-15 in the rear; rim size is 15" X 8". I had to use the smaller tire in front in order to get the suspension height down far enough to be able to adjust any caster into it at all, and I need more. The combination of the steering's vagueness, mainly due to the slow ratio of the manual box, and the lack of caster result in poor steering. I would be interested in hearing any suggestions about how I could improve my steering without spending a lot of money. Thanks!