Gas Filler Tube from maybe a 70 Dart

Hey Bud, dont think its a 70 Dart piece. Vent tube is on the wrong side and there appears to be only 3 holes for screws by the top of the neck. 3 holes would be on Dusters and maybe Valiants and 67/69 Cuda?? Just trying to help. I was looking for a spare for my 70 Swinger.
Chas.