I would loosen and tighten each and every brake line fitting several times to make sure that you don't have any leaks (fluid out, or air in). As you do this you will be amazed how much more they will turn compared to when you do it just once. This will give you a very positive fit that will not leak. It is VERY important to do this on stainless steel lines.
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission