Hydro boost system on lifted trucks and heavy tires?

My old 01 Dodge Cummins---which I converted to 4WD last fall--has the best (factory) brakes on any vehicle I've ever owned. It just flat STOPS. I'm not worried particularly about failure (engine failure) because it's a stick, so unless the engine locks up, I can motor the engine through the gearbox to keep the PS and hydroboost going.