Tanks inc Tank Vent Question '68 barracuda

There is a seller on ebay selling a sending unit for A100 van that is the correct design. It works fairly well but not completely accurate. Its full when it says full but when it hits empty I actually have about a quarter tank left
I tried and tested on of those and it was no better than the aftermarket ones

My recommendation is if you have an original have it rebuilt. If you don't put up a wanted ad for a OEM unit working or not.

As long as it is not all rusted it can be rebuilt.