1972 Front Disc Brake Conversion

I have a 1972 Duster, 318 motor. It runs and drives, is pretty much all stock and overall in really good shape. This winter I would like to put disc brakes on the front of it. I've been looking at a lot of kits and had some general questions I was hoping someone could help me with.
1) Do you have to replace the upper control arms when doing a disc conversion? There are various kits out there and some seem to come with them, others don't.
2) Do you have to replace the lower ball joints?
3) Do you have to replace the booster and master cylinder?
3) Any recommendations on what kit to buy? I'm not looking for anything fancy. More about effectiveness and reliability. Are there any kits that are "easier" to install than others or are they all the same.
Any advice is much appreciated.
Thank you,
I used a Pirate jack kit but manual.... and honestly i wish i had kept the stock drums... the discs don't stop as well and it was money wasted.. i wish i had my drums back at this point (trash it all of course) But with power i'm sure it will be fine. The pirate jack parts worked fine.