Weird...cam problem maybe?

No, carb icing can and will always happen if the conditions are right, nothing to do with bad gas. It's that pressure drop when you're cruising along (air @ atmospheric pressure then into the intake manifold's vacuum) That's why I decided not to buy an Edelbrock "Air Gap" intake manifold. Gets too cold at my place in the winter months.

But you should still run your bacon on "lean"......:D