John,
I don't remember exactly what you have to give up when running an oddfire setup, it was long ago when I looked into it. From memory you must do away with fan control, knock retard(sequential box required), and I believe fuel prime and/or one other function. A couple Syty guys have successfully done it or are doing it, Ghettosled and Odd-Fire V6 on Syty.org, they could explain better than I. I didn't do alot of research after my initial inquiry because motec was the right way to do it.
How much adjustament is the sequential box capable of again, 10/15dg per cylinder? Odd-fire order is 165432 on a 150/90/150/90 sequence.
Chris S