Ask and you shall recieve! (Flip Top Gas cap Adapter)

Grassy and Mr Stix:
What year vehicle?
I have been told that sometime around 74/75 that the filler neck is slightly different in the way it was designed and may cause the whole assembly to sit further away from the body. Do you mind posting pictures of the filler neck with nothing installed? Ill then be able to see what is going on and find a permanent solution.
Thanks