I agree, in 67 I bought a 440 Gtx at my local dealer and a St Louis car , the air cleaner was large unsilienced and without snorkels which is totally wrong as I understand! AFB carb as correct but this cleaner! So there your statement is well supported!The photo in post #1 is the exact same as our 68 Coronet R/T that was bought new.
Working for a Dodge dealer back in the 60's-70's We got allot of cars in that Chrysler never made.
Line workers some times grabbed what ever that would fit. Most often were the Plymouth/Dodges that were built on the same line.
Late 70's were the worst.
I've always said never say never when it comes to Ma Mopar.