[Dirty Harry]

I have an Edelbrock 600 which performs very well now. I had a bit of a stumble when accelerating from mid-range. I went to the Edelbrock website, clicked on their tech line, e-mailed my problem and, voila! That same afternoon, I received a reply which walked me through the solution. I would advise checking with the company for advice about their product. My experience with them was a good one.