I don't know what type of pump Jon recommended and Chris bought. I can't tell from the external appearance what type of pump it is.
The pump I was referring to was a Carter P4070; a rotary vane pump. It will lose it's prime if the tank runs dry. This is the second P4070 that I bought. The first one died after I had put the car in storage. I had shut the pump off and ran the carb dry. Unfortunately, the pump still had some gas in it and it had become gummed up. Out of storage, when I switched the pump on it couldn't turn due to the gum and the motor burned out. Lesson learned is to check that the pump is not gummed up after it's been stored for a while! If necessary, the pump parts of P4070 can be disassembled and cleaned.
I note that Holley pumps are vane rotor types. I won't be buying one from them.
The pump is designed to push fuel and not designed to pull fuel out of the tank.
Is the gerator design better at priming? I don't know.
Car manufacturers put the pump in the tank. That would solve the priming issue.
