65 Barracuda Brake Distribution Block Woes

Hello!
I am working on my 65 Barracuda, lovingly named Tina. I have put way too much time and effort into her to keep hitting the same problem over and over again. She is far from roadworthy, but without brakes she isn't moving an inch.

This car is a 10" drum/drum setup, iirc. I have put almost everything new from the master back, except for the distribution blocks on the rear axle and the frame at the front. The one on the rear never had an issue, except I hadn't fully tightened a line into it so it leaked until I tightened the line. The block has 3 outs, 1 in. Two front lines and one headed to the rear splitter.20200803_124336.jpg
The front block I cannot get to stop leaking. New lines, they threaded in perfect. However, I am getting leaks from the top of the brake line fittings. At first it was only the line coming off of the master. I tightened it as well as I could (it's an insanely small space), and then the passenger line started to leak. I tightened that, no more leaks. Then the line coming from the master started to leak AGAIN. I have tried and tried to get the line to stop. I backed it all the way off, tried to thread it back in, still leaking. I have been told to not use thread tape, as it will have some kind of effect if it gets into the fluid.
I am looking for either a replacement or a remedy. Looking for a new replacement has been a nightmare. All of the "replacements" have not been right and possibly for disc/drum. I am so lost on why I can find pre-bent lines that lined up perfectly, but not the block itself.

Any help is greatly appreciated!