Returning to the matter of the fall of Fascism:
- By the time it happens, at least two and an half generations would have lived entirely under Fascism. Indeed, many of the current hierarchy will be dead around 1975. Curiously, party secretary Carlo Scorza of TNO "fame" will be one of the last old members.
- Of course any successor regime will have to deal with a fascist burocracy.
- It is reasonable to assume a sort of perestrojka, due to internal and external pressure.
The PNF, which was engineered by Mussolini to be a melting pot devoted to him, left without a unifying leader will probably splinter about some issue, expecially Ethiopia.
The most intransigent part of the party will be in minority, and subsequently the moderates and the reformist will start making gradual changes. The constitution of the Kingdom of Italy could be changed with a normal law, which in the fascist state meant Mussolini could change it with a decree, which he did several times.
The end result will probably be a sort of authoritarian democracy, where the party system is composed of 5 or 6 parties, namely the militarist-chauvinist right-wing, the center (retains the PNF moniker, represents the hierarchy, most of the industries and corporations, and the burocracy), the fringe Liberal/Radical/Green party (~3%), the left wing fascist party (MSI seems a good name), the PPI/Democrazia Cristiana (center-left to left, 15%), a version of the PSI which will totally be against communism due to the experiences with Stalin and will intercept around 5-7% of the votes, at first.