Recently bought a non-roadworthy 120y sedan for a project car.

I would consider the brakes to be sub-par at best, Bled fluid front/back the day i recieved it, the fronts had what appeared to be rusted fluid in them (was brown). Did a complete flush until fluid was clear and air free.

The Pedal is considerably hard to push. However that's comparing it to my 80 series landcruiser, so its probably not much help. But putting all my force on the pedal isnt enough to cause the wheels to lock up. I wouldnt consider them to be unsafe, but the car doesnt stop as fast as i'd like it to.

Another thing probably worth mentioning, that for the first couple of drives i took it on after i replaced the fluid, whenever i'd slam the brakes on to a halt, after the vehicle stopped the brake booster (or master cylinder, not sure) would make a loud click which was also able to be felt through the brake pedal, This stopped happening after the fluid was replaced.

Im thinking the booster is on its way out, but im really not how to diagnose what is the cause. I'm hoping to not have to replace everything.

Going to replace the pads this week just to make sure it's not and adjustment issue, but other then that, any suggestions as to where i should start looking.

Thanks in advanced