rear drums, adjsut them again, could be the factor your rear cyclinders have to push so far to take up the gap between your shoes and drum, and then once that gaps gone the brake work like a mad ####
wont be master casuing that as if the master was fucked the pedal would go down slowly to the floor, or have a look at the push rod on your pedal and make sure that "travel"isnt just you taking up play cause the push rod isnt pushed out enough, but dont wind it too far, as you will cause other issues (brakes dragging) if you still got issue ill come over either after drifts friday night or something (busy all weekend with jacqui) so doubt ill be able to look on weekend
also there retarded like there owner![]()