YES! Anything that low or lower will cause fuel problems. For best performance the bottom of the pump should be in the neighborhood of 1' above the inlet on the carburetor. You can also have problems if the vacuum tank is too high. It can possibly over power the float and cause flooding. (Any fuel coming out the vent hole on the carburetor is a sign of problems with the inlet valve "float".)  
RAY Chevradioman http://www.vccacolumbiariverregion.org/1925 Superior K Roadster 1928 Convertible, Sport, Cabriolet 1933 Eagle, Coupe 1941 Master Deluxe 5-Passenger Coupe 1950 Styleline Deluxe 4-Door Sedan 1950 Styleline Deluxe Convertible 2002 Pontiac, Montana, Passenger Van 2014 Impala, 4-Door Sedan, White Diamond, LTZ 2017 Silverado, Double Cab, Z71, 4X4, White, Standard Bed, LTZ If you need a shoulder to cry on, pull off to the side of the road. Death is the number 1 killer in the world.
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