Well to be honest Holley does recommend 30# injectors with the kit. What heads do you have from Holley (vlave size, PT# if you know it) I went with the 24# injectors because I heard people having issues with too much fuel with the 30#'s, but now I wish I would have went with the 30#'s injectors as I have done more mods adn the heads and cam I currently have could take advantage of more fuel. I really don't think it;'s the injectors but it could be..nothing surprises me any more. When you said it was popping at cold start and idle, I had that problem with my 75mm Pro-M, after it warmed up it disappeared. How does it feel in the lower Rms, where does the cam feel like it comes on, where does the power feel like it falls off?
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