I have a 71 Nova with a small block 350 with a Edelbrock carburetor and intake new full pump,new gas tank and fuel sending unit. I have a clear gas filter right before it reaches the carburetor I can see that it doesn't have a constant flow of fuel going into the carb. If the car sits for a few days it won’t start on its own without dropping some gas in the carb it seems that fuel won’t stay in the gas filter. The gas filter is never full of gas at all . Car stays on at little but will shut of when accelerated due to not enough gas.