The root of the problem is the Edelbrock carb. They, like the Carter AFB feed the pump shot cylinder from the top of the bowl. So any evaporation and you have no pump shot. It also requires a lot of cranking to completely fill the bowl so you can finally have pump shot.

At least a Holley feed the pump shot from the bottom of the bowl. So even with 90% of the fuel from the bowl evaporated, you will still have pump shot. Which is what ALL of these car need to fire up on a cold start.