[Shyguy]

Ah, now this kind of clears up some stuff when you say you only have an electric fuel pump. Vapor lock may not be the problem.

The fuel pump may be the problem. Is it close to the exhaust?

You could go with an Eldelbrock fuel pump and regulator with both mounted away from the exhaust or shielded from the heat of the exhaust.

Have you checked the condition of the pickup sock in the gas tank?

Just throwing out some ideas at this point.