Might be on early A.
My 1971 and 1972 E Body's came with them from factory.
My 1973 340 A Body came with one too.
I never had leaks from them.
And both the E Body's were daily everywhere driver's.
The early A Bodies ones have a different angle then later ones.
I have over a hundred filters made by Wix here. Short, Medium and Long ( some are private label)
Bought a close out at 50 cents to less than a dollar each. So that's what I run.