Idle adjustment problem

[wmws]

I am a little confused about this stalling when braking hard. My car does this only when cold or sometimes when stopping going down a very steep hill. Some say the carb is too rich some say to lean. It seems to me that when you put on the brakes the gas in the float bowl would move away from the jets thus making your mixture too lean. So making the float level a little higher and or the idle jet a little richer would help. Am I missing something?