65 barracuda gas fill issue

The one on the left is an NOS '60-1 cap 2240319, the one on the right is the '62-6 cap 2074054.

That might be a 2240319 (or superseding 2084608) on the left. I have some doubt as to that red one on the right being a factory 2074054 (which is what both those other numbers supersede to). I did forget about those older two numbers!

But whether the red cap is or isn't a 2074054, I'm stickin' to my claim. I horsed around with enough capswapping on the '60-'62 Valiant-Lancer cars over enough years—including finding a damn-near-perfect OE painted-body/chrome-handle cap on a shockingly original '60 Valiant in a wrecking yard and installing it on both my '65 Valiant and my '62 Lancer to be pretty certain I'm not wrong about this. That '60 Valiant cap fit all three cars (the '60, '62, and '65) correctly, with the handle horizontal when the cap was installed. It wound up on the '62 long-term.