Pop N Wood, I'm guessing you don't know much about carbs. Having an adjustable rear jet in the carb only allows for more precise fueling than a vacuum secondary carb. If the idle circuits are too rich then you can turn in the idle mixture screws or just put a piece of welding wire into the idle circuit in the metering block, etc to lean it out. Chancing idle air bleeds will do the same thing if yours are adjustable like a proform, quick fuel, etc is out of the box. I would recommend going to a local library and taking out a book on holley carb tuning or buy one from borders or the like. It along with a wideband 02 tune will prove to be the best investments you can make.
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