How old is that carb ? The last time I saw you post I think I mentioned that I had a similar problem and it was the accelerator pump in the carb . When it stalls ( when you let your foot off the pedal) is it flooding out or because of a lack of fuel ?
Are the vacuum readings within spec on your engine ?
Have you tested the fuel pump pressure ?
It almost sounds like you may have a big vacuum leak somewhere.
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