'67 273 Air cleaner Question

My brother's '67 Barracuda notch has a 273 2 barrel intake. His car is in storage and I don't have access to it at this time.
He purchased an original 4 barrel intake and we are now looking for the correct AFB carb. His original air cleaner is black without snorkels. I have been able to find 14 inch carb base plates that will fit an AFB opening. Does anybody know what diameter the original air was?