1964' GMC Pickup time for a brake upgrade!

right now its got manual drums, single suicide line. i'd like to swap to a power brake setup, preferably on the cheap! whats the best way. oh by the way i want to keep the 4 drums and my lug pattern

 

Power booster and duallineM/C east to make one from an 80.s gm s10/car c10 etc.

 

i was thinking of ordering one from a 1964 i guess it was an option for some because it shows it on parts dealer websites