Disconnect fuel line from carb. Run hose into 5 gallon pail. Time one minute and measure fuel volume. Compare to requirements for hp and et.

If volume is low measure voltage drop to pump on positive side and then negative side at running voltage.

If you want to get really into it. you could get an oscilloscope and current ramp the pump, acquire frequency and calculate rpm, and pattern integrity. This is how we teach fuel pump diagnoses on non-race cars.