Why oh why. Sudden oil pressure drop.

Quick question before I begin the evaluation. Would it be bad to hook up an air pressure line with say 40 psi to the second port at the back of the motor to test the gauges. In other words, adding air pressure to the system at the port just 6 inches from the other port? This would be just to check the gauges for a few seconds.
I will still pull the distributor and drill the pump counterclockwise with an analog gauge installed before starting the motor.
I also found that the super sniper efi has a setting that can be enabled that if oil pressure drops below XX psi for XX seconds it will shut down ignition. This is a fail safe that I would configure.