Power brake conversion questions ('70 Dart Swinger)

Why two lug wrenches?
Because I said so thats why LOL
His OEM tire tool ( I should have said tire tool before ) wont fit the 1/2 lug nuts. A universal pattern spare wheel and a 4 way is a solution.
All the earlier posts were steering away from a vacuum assist/booster and toward disc brakes without mentioning the wheel bolt patterns, proportion valves, etc. I thought someone should.
I'll add one more point to ponder... Modern technology / anti-lock brake processors and those valves will alter, modulate, and redirect the fluid pressures that driver creates, yet the assist booster remains to do what it always did, reduce diver/pedal effort.