Denny et al,
I think you are right but the issue is with the bango to the wheel cylinder connection. I cleaned the bango (if by bango you mean the little brass block that bolts to the wheel cylinder) and used a new line and fitting. The leak is between the bango and the new wheel cylinder. I don't have a copper washer between the bango and the cylinder. I will check but I dont think I got any with the new wheel cylinders.
I am hoping this solves the problem. I was dreading doing the brakelines and the job went very smoothly except for this leak at the blocks.
Thanks for the help guys. I will try to get to napa today and get the washers and post back tonight if this works.