Is it possible to dump the injection ECU and keep the ignition one on a nova GTE?

The units are seperate, nearly all the sensors are driven off the ignition ECU. There are just a couple of wires linking the two in the wiring diagram.

I don't have the pinouts of the units to find what these are, so I can know which unit is feeding which.

Or just sod the lot and go to mechanical ignition for use with carbs?