octane boosters?

If you were rich, and went to lean, you may have just gone too far. Generally, a rod change alone up or down one size is the biggest change you want to make. Then, if you can't get it where you need it with that jet, you jet up in size, then start witht he small reods with the bigger jet. think of the jet as the "major" change, and the rods as the "finer adjustment". I think you just went too far. Why did you think it was rich? (edelbrocks are typically lean out of the box on a performance engine)