Crank Sensor

To check pickup polarity it is simple to place grounded plug and cable at coil, then use timing light on that cable to verify that spark occurs when reluctor teeth are aligned with pickup. Incorrect polarity will show between teeth, a horrible, iffy place to trigger a spark.

One way to get the near to the EFI trigger you need is to add a current transformer, with conditioning circuit, as sensor for #2 plug spark. A clamp on timing light uses such a sensor. There were a few crank triggered cars in the mid 80's that used such a signal for phase reference. The #2 signal, then lets you replicate, the offset tooth for #1, by stating with the normal electronic distributor signals. Yes it will involve a small 8 pin micro, but the task is easy. It avoids adding a reference tab and sensor to distributor. The timing variation due to mechanical advance may not create significant problems, but lack of correct reference pulse may force the ECU into limp home strategies.