Any ideas how I can fix fuel inlet leak on my slant?

Hey guys. 65 dart with 225 slant. The fuel inlet to the carb is leaking. Threads on the bowl are stripped. Is there a helicoil kit available or does anyone know what size thread that fitting is or what I can do to fix it?

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I see a drip on the bottom of the nut. Is it leaking from where the nut attaches to the bowl? The line is a inverted flare fitting and if both components of that are good it doesn't need teflon tape.