How to read carb calibration chart?

First thing to do on an Edelbrock imo is set the float level. They can be finicky and don’t like mis adjusted floats. Second is get the thick insulator gasket Edelbrock sells, do not substitute here. Third is order a “calibration kit” from Edelbrock for that specific model carb. There are many different kits and they are carb specific. Third is make sure you are reading the correct chart for that model carb, again Edelbrock has a chart for every model and they are different. Forth, get a note pad and document changes to the carb and how the engine runs. All of this is assuming the carb is clean and has all box stock settings. They respond to changes pretty well. Write everything down.