Lubricating oil pump service life?

[JMBT]

Thanks for the response man, quickserve shows when inspecting the pump off the motor to measure between the two gears on the pump for a result, then after mounting on the motor measuring as you said between the crank and top gear. the measurement off the motor is supposed to correlate with a chart on quickserve based on what number is stamped on the pump. Also the drive gear shaft measurement is throwing me off??

My brother says just put it back on and run it, but I want to make sure it's ok.