Projects Can I get a little Hollander interchange help?

1964 - 1966 Plymouth Barracuda...what other gas tank fits?
Are Valiants the same?

 

My book shows Dart Barracuda 64-65 , Dart 66 except station wagon , Valiant 64-65, Valiant 66 except station wagon and Barracuda . Also fits 63 Dart and Valiant by using Chrysler seal 2203473.

 

Makes me wonder what changed in 66...only on the wagon and 'Cuda.
Hmmm!
There is a 1/4" line that comes down next to the filler neck that stops at the tank. No line/hose/fitting on the tank of any kind.

Oh well.
Anybody have a spare '66 Cuda / Station Wagon gas tank laying around?