So my Dad has a 86 f250 4x4. My dad and I are just stumped we cant figure this out. The truck has a new brake booster replaced like 3 years ago, new front calipers and new brake pads and rotors, just replaced the master cylinder, the drums shoes are fairly new because we dont drive the truck often drums were turned also the rotors were turned. For the life of me it has the slowest reacting brakes it like you Emergency stop and it acts so slow I'm not saying I want it to brake like a new car but it has to better then what its doing. We bled the rear and we bled the fronts when we replace the rotors I'm not sure what else could it be or what I'm doing wrong.