Jon, what type of calibration work? re-jetting? Major tune session? I have a Holley 3310 on my mild 455 now, and have an EB 1407 I was going to put on it for a while until I can get the Q-jet I have built or set up for my car or get another Q-jet (the Q-Jet I have is a BB Chevy, but center inlet)

But now you have me wondering if I should even try the Edelbrock at all? If you have a chance, could you elaborate a little?

Maybe this will answer John's questions too?

Thanks - Brett - 67 Drop Top 455!