You can't use the bigport Dizzy as is to run two or four coils. It gives a pulse 4 times per cam revolution, so there is no way for the ECU to know which cylinder should be firing when. Though I have seen some setups on the internet that claim to run with 4 coils each firing four times per cam revolution. Seems pretty dodgy to me.
Your best options are to:
- remove 3 of the 4 teeth off the pickup wheel in your bigport dizzy (there is also a 24 tooth wheel in there, don't touch that).
- Find a smallport dizzy or smallport GZE CAS. They have a one tooth wheel (in fact two of them) and a 24 tooth wheel which should be fine to run.
Good luck