Stalling issue...

[psychoSEAL]

The car has been running fine and even better after increasing the idle speed just a little. By mistake I filled up the tank with 89 octane gas and I usually run 93. This is where the problem started. Not sure if the Exxon station I went to sells much 89 octane. While driving to a car show after 10 miles down the road the car wanted to sputter and try to stall out. The more I drove the worse the stalling got and was becoming a friggin problem on the highway. While driving back from the car show that evening the car did the same thing which I expected it to do. Got home and just when I hit the driveway the car stalled out and I pushed it into the garage. Used carb cleaner just in case. Car runs fine in neutral and park. But once I shift it to drive it wants to stall. Could it be the gas? Holley carb needing adjustment? I also checked for a vacuum leak using break cleaner. Nothing showed there. Any thoughts, ideas or solutions? Or would a stick of dynamite be a good solution? Thanks!