Flip Top gas cap question

[Yeya93]

Hello everyone. I'm in the process of fitting my repro flip top gas cap on my 70 Challenger. But before i make further modifications, i wanted to ask if this opening pointed with the red arrow is supposed to be there? I'm using AMD quarter panel and repro gas cap. Also, if anyone else can share pictures of theres installed, that would be lovely! Thanks.

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[headejm]

Not sure if it's supposed to be there but my cap assembly has the same opening. In 40 years I've never noticed that. 

[Yeya93]

Thank you @headejm ! I really appreciate it. I didn't wanna do anything that isn't necessary thinking that something was initially wrong. It looks like mine is a bit more open as far as gap, but i wouldn't think otherwise since it is aftermarket.

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[MoparLeo]

You are missing the top collar on the filler tube. It attaches the tube to the fender and has nothing to do with the "cap. The flip top is not really a cap is is only the cap cover. The reproduction cap cover is an exact duplicate of the original as far as shape.Your picture looks like you attached the trim ring and cap cover to an empty fender. No gas tube attached.  Could be wrong, thats what it looks like though.

[Yeya93]

@MoparLeo yes you are correct. No filler tube was attached. I had it sitting in the trunk, but just wanted to make sure that the gap was a norm before i did something stupid by trying to fill it in somehow. Thank you, now I feel comfortable with proceeding

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