I've changed the master cylinder and hydro boost, there was a leak between the two, also i had to add power steering fluid once every two days (with the leak). there's pressure from the power steering unit when i loosend one of the lines fluid rushes out. the truck is a 1997 12 valve, 2 wheel drive dually, cruz control, 204,000 miles, kdp tab, big exh, custom plate, auto with DTT converter and trans, all the gauges.
thanks in advance for the help.

 

No brakes at all, or just really stiff pedal?

I had to replace my power steering pump when that happened to me.

 

Hard pedal, there is some brake

thanks for your input.