[Adger Smith]

Mike,
I wish I had an answer for you. I've had customers that ran into the same issue. Started quite a while ago with a Circle track customer Up grading and I another recently that had a distributor that wasn't compatible with his box.
If I got this right his box was a digital 6 and the distributor pickup was for an analog box. I have 3 coils that I kept with our dyno and a couple boxes. I always liked to dyno with as much of the customer set up as possible.
I've run 7 boxes in all my own cars, never any issues. I have noticed that the 6 boxes have a rev limiter that isn't as harsh as the 7's.