Correct Master Cylinder/Booster 1971 Nova

[Benl]

I am looking to put power brakes on my 1971 Nova. I want to keep it original, so i thought this would be the place to ask my question.
As I am looking at all the options, I am not sure what is the correct combination. My car has front and rear drums, and an externally stock smallblock. It was originally manual brakes.

The following are the things I was wondering about.
9" or 11" booster
squared off or rounded master cylinder
Master cylinder with bleeders or not

anyone else done this conversion? what else do I need, it seems there is a bracket that mounts on the engine to hold the vacuum hose, a new vacuum fitting for the intake manifold and the check valve and vacuum hose kit.
I have been looking at ground up's products.....any caveats on them. I have had good experience with their other products so far, but thought I should check.

again I want to keep it looking factory, and I'm just not sure what is correct. Any help you guys can provide on this would be great.
Thanks guys
Ben