Why Skyline brakes?
seems a little over kill.

my only experience with the 300zx brake swap was putting the front brakes and rotors on all 4 corners of a rx7 and using the 300zx master cylinder. we used manual proportioning valves to get it set up right.
This would stop on a dime. That is, if the tires would hold.
It had a nice firm, solid feeling brake pedal to it, but we used a smaller brake booster. I want to say it was from an s14... I honestly can't remember. I know it was out of a 240 though...