"Hydrovac" on Owner type jeep

Good day mga sir.

My father has a 23 year old Owner type jeep with a 4k engine, the brake system is mechanical which is you need to pump it twice o minsan tatlo pa, i just what to know kung ano ang mga parts na papalitan at idadagdag. Gusto ko kasi i upgrade ang brake system, syempre safety first, better safe than sorry.