I'm about to undertake this also. PNP V5/6.
Do I have to mess around swapping the factory wiring, or can I just get the ECU to fire 1,2,7,8? (7/8 being the expansion loom).
Ign 3 is currently a factory thermo output and Ign 4 was a second fan, but been changed to a second, staged, fuel pump.