Have Black September end with the success of the PLO, or have the Arab Federation survive.
A more interesting pod would be a Free Princes revolt actually gaining traction and developing into an outright civil war. What would Jordan do if their and archnemesis fell into chaos and anarchy?
The area of the Hejaz was relatively progressive compared to the rest of the nation, and there's also a Shia minority in the eastern provinces.How much of a liberal current was there in mid-20th century Saudi Arabia? Could the searching of Prince Talal's residence and his critical press conference in 1962 have led to something substantial?