You could test your pump by running the gas line up front into an empty 2 gallon gas can, it should darn near fill it in a minute. I believe that pump you're running free flows at 125 GPH. If it does then the pump is probably OK.
I tested my elec pump last night by removing the fuel line at the carb and flowing into a can with the elec pump. It took 1 1/2 minutes to flow 1 gallon and that is with no restrictions the carb induces - ie with the pressure gage reading zero cause the line was just dumping in a can.
I am thinking the pump is weak or the stoick gas line is too small. Might not even be flowing enough for the little 340 at 6000 RPM. The stroker I bought has dyno sheets calling for 38 GPH so definately will have to be fixed before putting that in the car.
