have hard brake pedal car stopps safely but with firm presssure applied, worst when emerency stop simulated. gets scary., slow to grab. need possible solutions ,,over last 4 years have tried new master cylinders a proportioning valve , new hose braided, tested vac on intake, flushedfluid several times, different pads, new rotors, a remanufacter booster. new ssbc front calipers .also did spring change , using heavest spring noted which does help rear calipers slow rear wheels now. front rotors will heat up during testing . but pedal still hard. booster change had no effect .infact all things i have tried did nt improve hard pedal . have redone entire car but this is got me. any suggestions to try.. i also have a 1989 form.bird and its braking totaly better? dandav65 thanks

 

bump got the same problem after a rear end swap in my 87