1967 Plymouth Barracuda - Fuel tank not vented properly??????

I don't know how that line is supposed to be secured on a fish, but that is EXACTLY how it is configured, with a "U" up high near the top of the fender.

And ending down into the frame rail is EXACTLY how it ends

If it is dripping fuel, it is VERY simple---your tank is too full. The fuel is clear up into the filler tube, clear up there at the vent line connection in the filler tube. Expansion will force the fuel up and over, and it will drain, until it gets below that point. In other words, "anti siphon" or "siphon breaker."

Your only correct solution is to not fill it that full.

Is it possible that your tank is damaged/ crushed and not as large as it should be?