Gas Cap - Difference between 63-66 vs. 67-71 vs. 72up?

[1966DartConvertible]

Hi

My '66 Dart gas cap is not sealing properly, need a replacement gas cap before I ruined the new paint.

Just wondering what are the differences between the '63-'66 and 67'-71" cap? what about the '72 and up gas cap?

Can I use the 67up on my '66 Dart? Will it seal properly?

Also, among the gas cap for '66, which one would you recommend? (brand vs stock) and where to buy it.

Thanks

Syed

 

[belmateo]

I am not sure about the 66 but I do know that 65 and back to 62 are a smaller pipe diameter so the cap has a smaller center. I have seen them online for sale at the auction sites and they seem to be pricey. Someone here may have one they no longer need.