It should be understood, that Reagan being elected in 1976, doesn't mean that the Iranian Revolution will happen like it did IOTL. I have read an alternate history book entitled "Then Everything Changed," by Jeff Greenfield. In one scenario, in which Gerald Ford wins reelection, Henry Kissinger received a letter that the Shah would've sent to Carter, which stated "If there is opposition in the Congress and in other circles to see Iran prosperous and militarily strong, there are many sources of supply to which we can turn, for our life is not in their hands...Nothing could prove more reaction from us than this threatening tone from certain circles and paternalistic image." Because of this, Ford conveys to Shah unconditional support and gives him all the help he needed to restore order. Because of this strong support, the dying Shah begins to think about succession, along with one other thing.
To Be Continued