Living here in Phoenix, I feel like an expert on vapor lock. YES, the Edelbrock/Carter style carbs will vapor lock. There is virtually no fuel pump combination you can use short of a very well engineered electric pump set-up that will cure this problem.
The factory used a 1/4 thick gasket/spacer on the wedge motors and when fuel had lead etc... had had higher volatility temperatures these were fine. With modern re-formulated fuels no way is that enough in tough climates such as Phoenix. and I'm sure parts of Florida.
And just for the record, when it's 110 degrees ambient outside Holley's vapor lock too!