My vent tube was on the filler neck. One feed line and one return line.
I have since added a electic pump, and I ran a AN line from the tank and the pump, then to the carb.
I got a new tank and sending unit this spring and the tank had the vent tube on te neck just like my old one. My sending unit, only has one nipple this time. Everything is working just fine so far....
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........I'm just learning as I go.......
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