Best Mechanical Fuel Pump

Sounds like the floats in your carb are set to high. Or there is a problem with the

float needles and seats.

What kinda carb are you running? The fuel level should be at the bottom of the fuel bowl

level check plug. Side of bowl (Holley). Do you have a carb manual very helpful.

Your pump is just a regular Holley with AN fittings nothing fancy.

I have the same pump from FBO.

1973 Dart Sport 340 8.0 1/8 mile