I have a new Fuel Filler Neck that I procured through Van Auto, it's for my 65 Dart 4 Door, Base.....I actually got Damraider's Cap prior to receiving the Filler Neck and was a tiny bit concerned about the fit....
Well, Zoom in and see the EXCELLENT SEAL ! ! ! The fit is beyond proper....you literally feel the Cap pull and seal against the filler neck....bravo Damraider....
I would love nothing more than to post a picture of the inside of this cap machined by Damraider (but I am not sure if I'd be giving away his trade secrets) as it is really an awesome piece that seals unbelievably well!