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in my experience with 6-paks, 39yrs, stalling when coming to a stop is usually one of, or maybe both, of two things. the idle mixture screws in the end carbs are set too lean or the float levels are too low. i have two cars with 6-paks and they drive very well. the idle mixture screws in the end carbs are between 3/4-7/8 turns out and the float levels are set to where fuel just slightly trickels out at idle. i use 64 main jets on the "stocker" and 65 main jets on the car with a little cam and headers.



i have (had) 66 jets in my center carb and the wideband o2 monitor shows i was rich at part throttle cruise. im going back down to 64's today and will see what effect it has.

i use the vacuum advance on both engines, too. actually, the "stocker" will run fine with 63's. the center carb is pretty small and just doesn't need the bigger jets.