Steering and Braking Help!!!

[67 Demon]

I have a few questions that i hope you members can help me with. I apologize beforehand if i ask too many questions.

First, i am wanting to convert my stock manual steering system to a much more efficient, easier one. I have been told by a mechanic that i trust to look for a rack and pinion steering system. I have found some but really dont feel like spending $1K+. My other option i assume is to get a quick ratio steering box. I found one through a company called Flaming River. That steering box is $399 and significantly cheaper and has a steering ratio of 16:1. Can ANYONE please give me feedback/info into pros and cons of each system. I dont know what the steering ratio is for the rack and pinion, and is a racka nd pinion NEEDED or can i get away with the quick steering box? With the quick steering box, will i need other components?

My next question involves a drum to disc brake conversion kit. What is the major advantage/difference between manual and power disc brakes? Also, i realiize that it is possible to swap out Granada (and other cars) brakes into the Mustang for a fairly cheap price, but what is the cheapest price you have found on a conversion kit? The cheapest i have found is about $725.

Thank you for ALL of your help. I would REALLY like to get my Mustang on the road again and give my new toy a rest!