Fuel line to pump "Need help" :)

I did this same thing for a while. I found an inverted flare fitting at the parts store that was hose barb on the other end. 5/16 inverted flare, maybe?

I don't believe AN would work correctly.

You can buy 5/16" brake line that will fit up, but bending it is a ****, plus you want to install a filter between pump and carb.