The guy who did most of the restoration work purchased it for me, and he couldn't solve the issue. Took it to my normal mechanic who works on all of my cars for 20 years, and he couldn't solve it, and both of us called Holley numerous times including one day where I stayed on hold for more than 6 hours with no answer. Replaced it with an Edelbrock carb and have had no issues including today driving in 110*F heat in the San Fernando Valley.
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