1970 XR7 distribution block -disc brakes

Can anyone recommend a good new distribution block - disc brakes supplier for a new distribution block for front disc and rear drum? I am trying to take the old one out and rebuild if possible but I have one line that is not letting me take it out. Any suggestions? Any help is appreciated

I’d cut the line close and then put a line wrench or box end wrench on it instead of an open end wrench. Make sure it’s secure in the vise with a rag around it to minimize teeth marks and go gorilla on it, you have nothing to lose. Rebuilding those is easy if you know the trick.