Help with fuel line!!!

[bergsvette]

I am currently under the car running new braided fuel lines and don't know how to securly attach the braided line to the stock fuel tank... Any help would be great thanks! I tried a screw type clamp but inded up breaking the clamp because I couldn't get it tight enough.
This is for my 67 chevelle. Thanks!!

[69LT1Nova]

AN to tube adapter fittings:

https://static1.pt-content.com/images/pt/2009/08/ear165056erl_w-1.jpg