2823001, 67-68 Plymouth A.
My understanding is that cap technically was not available on the 67 A.
I can't provide proof as I can't find it listed as available.
In a parts catalog I'm sure it's listed as fitting a 67 or correct for a 67, but 67 was an oddball year.
I honestly don't know if it was available in 67 on the A. I know I have them on my 67 because they look great, but so many have told me they're 'not correct.'
Do future parts catalogs backfill into prior models?