i have a 750 edelbrock mechanical choke on a zz4 350. right off of idle it is running extremely rich. i just got a calibration kit for it and i tuned it fairly well for my new cam, but i cannot figure out the off idle studder. any idea how to lean out the low end? thanks.

 

is your float level ok? how about the air idle screw adjustment? im not real familair with edelbrock...i have a holley and a BG/pro form racr carb

 

i got it figured out now. it was the timing. all i have to do now is fine tune with jets and metering rods.