So, after personally going through a nightmare of trying to repair lines that have had bad ends and whatnot… I’d replace it all.
Granted mine was a connection at the fuel filter on the green Ranger, after replacing the line to the motor because my connections like yours was a problem. I repaired the connection at the filter 4 times in 6 months because every time it would randomly blow apart on the road. I just don’t think it’s worth trying to patch.
My Choptop started having a noticeable leak after that and remembering my prior experience, I ripped it all out and replaced it all. A close inspection showed not only the leak I noticed, but at least 4-5 pinholes in the rest of the lines.
I replaced things with stainless braided PTFE -6AN because it should last at least another 30 years. Not the cheapest solution. Dorman also makes stuff or it’s possible to cobble something together.
The only thing I don’t really have a solution for is the fuel rail lines because they’re kinda oddball. I was able to find good factory pieces for those (junkyard).