Hydr boost

[jason7698]

I have a 71 c10 with front disc brake and rear drums and Im wanting to upgrade my brakes to the hydro boost system. But I have few questions Im a long ways from a u pull it junkyard but I was thinking could I just go to a parts stoe and buy a hydro unit? I f I can what all would I need to do this upgrade should I buy the pre fabbed brackets that are being sold on here? Lastly I have a big block with taller valve covers because I have Jesel rocker arm studs will this interfere with the hydro unit install?...Thanks