Fitting needed to use braided fuel line

If the pump is a Carter stock replacement pump...I believe you need an AN6 to inverted flare adapter.....As i had the same problem on my 73 Duster....But I dont remember the thread size on the inverted flare side

I think this is it

Summit Racing SUM-220667 Summit Racing® AN to Inverted Flare Adapter Fittings | Summit Racing