Say the 1973 doesn't happen for whatever reason. Weaker Israel,no 1967, Etc
What would be the impact on Iran
While Iran enjoyed the higher prices, they didn't join the Embargo.
If Egypt was winning the War, thing may have gone much worse, aka the Samson Option the Israelis had, so I assume that war turned out as OTL, but maybe if the Saudis also didn't join the Embargo after Nixon promised aid to help the Israelis with billions of Military aid
No Embargo really doesn't change the fundamental problems simmering away in Iran, they and the Saudis were already making more and more Petrodollars each year. This TL, be a bit less