I can't even think about how much my fuel line cost with a "do" and a couple of "redo's"

The final ended up with mostly 3/8" SS with flex from the tank to the hard line, flex from the frame to the fuel pump then to the carb (looks plus functionality).

While there are some who will advocate 1/2" line, the 3/8" will provide as much gasoline as you will ever need for a mild small block engine.

A question - why do you need/want AN style fittings? They are nice to look at, but you do need a special 37* flare tool, patience, tolerance to pain from bloody fingers and money