I bet the leak was around the join between the pipe and ring the banjo goes through ?
Ford used some cheap nasty rubbish material when they joined these two parts together, it is too brittle and can crack.
The PERMANENT 100% EFFECTIVE cure for about £15 is to have these SILVER SOLDERED, it is called silver soldering but is actually brazing but with silver, you will not in a million years break these once joined, so find a local engineering firm that do silver soldering, or even better a retired guy that makes model steam engine/trains as this is fave way on these joining pressured fittings/pipes together, I used my ex's grandad, he makes 1 off steam trains, some taking 3-4 years, every single part hand made.
tabetha