Fuel line connection 6an thread to 5 /16

I'm just wrapping up my 2 barrel to 4 barrel conversion on a 73 318.
I got a Edlebrock AVS 2. (fired up right away)

I'm looking for suggestions on a good fuel line connection as the edelbrock line is a 6an thread and the dart fuel line is 5/16 the dodge threads are a smaller diameter


Thanks