Brake conversion - 1977 manual disc/drum to power/disk/disk

[D13]

I did a lot of searching but really couldn't find an answer that relates to my square body brake swap.

1977 GMC 1/2 ton, strippo special, manual everything (exactly zero options as far as I can tell). Manual brakes, disc in front. Desire is to convert from manual dics/drum to power disc/disc. I have bad knees so need the power brakes, and the rears need redoing so might as well go disc.

For the rear I intend to use Camaro calipers as the manual trans needs functional parking brakes, will probably use a board vendor's brackets. I'm assumming that I can keep my fronts discs as is. I'll upgrade to disc/disc prop valve and probably and adjustable valve in the rear line (or maybe that neat all-in-one...).

So now I'm at the booster and MC, and pedal. I understand the pedal ratio is different power to manual. And since I'm running a manual trans I can't just grab any of the common auto trans set ups. Fortunately my parts truck is a 1981 3/4 ton manual trans with power brakes, from which i could take the complete pedal, booster, and MC (probably bad).

So here's the questions.
1. Will my 1981 booster and pedal set up swap directly into the 1977?
2. Which Corvette MC should I use to do the swap, and will it bolt on without push rod customizing?