Pertronix II users

If you work the throttle/accel pump as it is about to die, does it make a difference? You said you checked the fuel pressure but what is it just before it dies (run a tee with a 1/8npt port for a FP gauge and a short hose to plumb)? Timing light to watch flashing for spark timing changes or failure just before it dies? System voltage monitored from crank to stall?