Need help with lean stumble on Holley DP

The IFRs are up top on mine. It's a newer 4779-9 model. I think I bought it new around January 2014. Not sure how to go about moving the IFRs to the bottom as you speak of. I'm still learning the carb tuning stuff so not sure what you mean on that. I think I need to buy that Holley tuning book I've heard people talk about.