Josh,
If you have aluminum heads then in your state where you can still get GAS you most likely won't notice much difference in the 104 and your pump gas. In the Republic of Calif. they use our pump gas to put out fires. Two of my cars have 11:1 and I run 110 racing gas in them and I can tell a huge difference if I have to drop back and use some of our premium 91 watered down pump gas. I am not sure why you had a harder time starting the car with the higher octane. I have never had a problem at all with that. Some of the people in your area can tell you more as they have access to your pump gas.
Ron
