[Dobie Gillis]

To me it stands to reason that Ford (or any other manufacturer for that matter) would use left over parts from a previous model on new models, even if not faced with a shortage of newer parts as long as they worked acceptably. No manufacturer, especially Henry, would scrap useable parts. Under normal circumstances the leftovers would be sold to dealers as service parts. Would they tell the general public? Nope, and I doubt the public would be any the wiser. If your new '55 Ford came with an EBU carb you would never know the difference in performance which was probably minuscule. They may have told the dealers in the form of a service bulletin, and if anyone could find that it would be the smoking gun.