There were plans, after the end of the second World War but before the establishment of the European Coal and Steel Community, to create a customs union between France and Italy - if you want, you can read this (in English) and this (in Italian) for more information about said plans. Nothing came out of them in the end, for several valid reasons, but what if a customs union had actually been established?
The best case scenario would be for Francital to become a sort of European Union on steroids, but only for Latin countries, inspiring the creation of similar regional organizations in Europe - such as a stronger Benelux, a stronger Nordic council, and maybe a Baltic union and a West Slavic union after the fall of the USSR - but it's hard to predict what the butterflies of such a customs union would be... given the strong leftist element in Latin Europe during the Cold War however, a hypothetical "Latin Union" could have interesting consequences during those years.
And of course, Italy could get dragged in the whole Algeria mess, to say nothing of Vietnam...
The best case scenario would be for Francital to become a sort of European Union on steroids, but only for Latin countries, inspiring the creation of similar regional organizations in Europe - such as a stronger Benelux, a stronger Nordic council, and maybe a Baltic union and a West Slavic union after the fall of the USSR - but it's hard to predict what the butterflies of such a customs union would be... given the strong leftist element in Latin Europe during the Cold War however, a hypothetical "Latin Union" could have interesting consequences during those years.
And of course, Italy could get dragged in the whole Algeria mess, to say nothing of Vietnam...