Hang on a second. That is not the brake line for that fitting at all! That looks like a "through the frame" brake line fitting which many off road people do and street rodders do to keep their flexible brake lines short so they don't get snagged or in the way of tight clearances. Your brake line has a machined slot in it where a "brake line clip" holds it into a bracket... but it doesn't look like the bracket you have there. Do you have the old flexible lines? The bracket with the "through the frame" fitting would have a flexible hose with a hex nut fitting on the end of it to tighten down to that flared fitting.
Check out "YJ V6 Conversion" if you want to see a frame up restoration of my 1992 YJ.
Check out "WWII Jeep Photos AND Restoration of..." if you want to see the original JEEP in action...